Once a mental hospital, the grade II listed house, which is 400 years old, has been converted into luxury apartments.
F4J bosses have said the stunt was carried out by a guerrilla splinter group following plans to step up operations in the city. Matt O’Connor, who founded F4J in December 2002, said he was not aware of the stunt.
He said: “There’s a lot of random activity going on in the West Country at the moment. This has been carried out by a guerrilla faction of Fathers4Justice. That’s the nature of our campaign at the moment.
“There’s always been a very strong power base in Bristol and things are starting to heat up again.”
Mr O’Connor has referred to Bristol as the “engine room” of Fathers4Justice in the past.
But the move has been branded "inappropriate and irresponsible" by the judicial office.
Nationally, the group has drawn up a list of judges who, it claims, have treated dads badly during family law cases.
Their names and addresses have been published on the F4J website, www.fathers-4-justice.org, in a list headed "Your Time Is Up: Britain's Worst Judicial Offenders".
Five judges from the Bristol circuit are named on the list: Andrew Rutherford, Paul Robert Barclay, Richard Bromilow, David Keith Ticehurst and Susan Darwall Smith.
The campaign group is planning to target them with direct action during the coming weeks.
F4J's Bristol co-ordinator, Nigel Ace, said: "We will be targeting judges nationwide and are going to be doing a lot more of these kind of stunts to put the wind up them. There are going to be more rooftop protests.
"There has been too much talking, what with everything that's happened since the original group disbanded. We're now going back to our older tactics."
Mr Ace said the judges being targeted were ones who are known to the campaign group through members who have tried to get access to their children in the city.
He said: "We're all for equality - but there's no equality in the family courts.
"You go in and feel like you're a child, but worse, because you're so powerless."
The announcement comes days after the campaign group launched itself in America.
Campaigners dressed as Captain America and Batman climbed on to the Lincoln Memorial in Washington DC.
Mr Ace hinted that the group could carry out more direct action in Bristol soon.
A Judicial Communications Office spokesperson said: "There is no justification or public interest served in publishing the home addresses or other private details of judges.
"It can serve no purpose other than to intrude into the privacy of the judge and encourage harassment of the judge and his/her family in their home.
"In the case of their court work, family judges have to make difficult decisions based on the individual circumstances of a case.
"By their very nature, these cases are emotional and feelings often run high.
"However, all parties have the opportunity to express their opinion to the judge prior to a decision being made and the right to seek to appeal decisions that they regard as unfair."
The giant 40ft penis of the world famous Cerne Giant, in the Dorset village of Cerne Abbas has been painted purple last night according to campaign group Fathers 4 Justice (F4J).
The group say they were contacted this morning by a father describing himself as the West Country's 'Purple Phantom'. Purple is the international colour for equality. Written beside the giant were a reference to a recently published book by Fathers 4 Justice.
The Phantom who styles himself and gets his inspiration from is favourite artist 'Banksy' wishes to remain anonymous but has commented
'The only people who might be a bit upset are the couples who apparently regularly copulate on the penis in the dead of night because it apparently has magical powers to boost fertility.It'll be interesting to see how many local men complain of purple hands and knees and women end up with purple bottoms and highlights! '
'The Giants penis definitely has a purple ting rather than a bright glow but rumour has it the local council have been 'rubbing it off' - Rather them than me you don't know what might happen !!'
When asked about any damage the Phantom said that 'The grass would grow quickly at this time of year and within the month you should be able to trim his bush.' If in a rush he suggested a quick Brazilian wax.
The 'Purple Phantom' also warned that he was going to close roads in Dorset and the West Country by spreading over two tonnes of purple jam onto major roads, dual carriageways and motorways. In the call he said, 'I've got my jam, and I'm going to use it.'
A picture of the Purple Phantoms bale banner on a very busy stretch of the M5 near Bristol Junction 20.
Campaigners dressed as Santa Claus to stage a festive protest during an Exeter Cathedral carol concert.Eight members of the campaign group Fathers 4 Justice stood outside the landmark building during the Lord Mayor's carol service yesterday.
Fathers 4 Justice member Jolly Stanesby, 39, who recently climbed onto the roof of a judge's house, attempted to scale the cathedral wall before police grabbed him.But none of the campaigners disrupted the service, which was attended by hundreds of people.
Dressed as Santa Claus and holding a huge banner and flags, a small group of Fathers 4 Justice (F4J) members stood outside the offices at Ford Park Lane, Mutley yesterday morning.
They handed out leaflets to passing motorists and pedestrians, highlighting the plight of fathers who are denied access to their children.
The group, who have staged many high profile protests in the past, are calling for changes in the law to give fathers greater access to their children following separation or divorce.
Regional spokesman Nigel Ace said: "Forty eight per cent of fathers don't see their children after two years. All we want is to see our children, and we won't be seeing them this Christmas.
"CAFCASS, an independent body working for the courts, have a prejudice against men and tend to favour women."
The protesters stayed for about an hour before heading off to Taunton.
Suzie Goodman, CAFCASS South West Regional Director, said: "We recognise that this is a difficult time of the year for parents who are not able to spend time with their children following separation. As an agency providing independent advice to the courts on family disputes, we focus on what is in the best interests of the child.
"We are not biased against either fathers or mothers and believe that, where there are no safety concerns, children benefit from a continuing relationship with both parents."
Matt O'Connor believes that while the superhero stunts gained great publicity for the cause, they were in danger of becoming a parody of themselves.

He is also concerned at the number of people who hijacked the Fathers 4 Justice logos and used it for their own cause.
The next big campaign from the group will see its 12,000 members being encouraged to support the call for overnight staying contact.
Fathers will put pressure on the Children's Minister Beverly Hughes ahead of October's parliamentary debate on family law reform.
They hope sending pyjamas to London will highlight the fact that many separated fathers do not see their children for overnight stays.
The new campaign follows proposals made by Fathers 4 Justice to the Court Welfare Service (Cafcass) to make overnight stays the minimum recommended parenting time.
Members are encouraged to include details of their individual cases when they send pyjamas to the Children's Minister.
A fleet of motorised beds will also hit the M25 as part of the campaign, along with a bed in a perspex box in Central London.
The beds can travel at 70 miles per hour and are completely legal and roadworthy.
On the night of October 20, Fathers 4 Justice members will stage an overnight protest outside the offices of the Department for Education and Skills before a "Bedlam" protest in Central London with thousands of men in pyjamas marching through the West End pushing beds to Whitehall.
Protesters taking part are urged to register for the march beforehand.
In keeping with the sleepover theme, thousands of alarm clocks will go off outside the DfES office where the group will hold a rally.
Matt O'Connor said: "We need to keep the pressure on.
"Cafcass have until September to wake up and start making genuine and meaningful progress with regard to family law reform.
"And overnight staying contact is at the very heart of what our campaign is about.
"We want MPs talking about the issue in parliament.
"The public need to be aware of what is going on and the kind of reform that is needed.
"This campaign will be something surreal and will keep disruption to a minimum." For further information about Fathers 4 Justice and the pyjama protest visit www.fathers-4-justice.org.










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