DIRECT action group Fathers for Justice is threatening to target Truro Cathedral for one of its high profile protests.
The cathedral says it will be making no comment about the threat but Truro's police chief, Insp Mark Richards, said while everybody had the right to peaceful protest they did not condone putting lives at risk.
"It is something we wouldn't encourage," he said. "All of the headline grabbing stunts they have pulled all raise concerns around the danger to themselves and other people.
"They could hurt passers by, by causing something or themselves to fall. It is a civil offence to trespass on private property."
Members of F4J - who campaign for better legal rights to see their own children after marriage break-ups - say they are using the South West as a national springboard for a tour of the UK in the coming weeks in the build-up to their fathers' day protest march in London in June.
Members of the group have already scaled the walls of Buckingham Palace and the Tamar Bridge, closed roads and motorways and handcuffed themselves to government ministers, in many cases dressed as superheroes.
This new campaign will apparently lead to more protests with roads and bridges in the South West being temporarily closed and buildings such as Truro cathedral targeted.
The organisation says it is about to launch a new campaign with a new theme and a wave of spectacular direct action protests on national and local landmarks.
As well as Truro Cathedral provisional targets in Devon, Somerset and Cornwall include the Tamar bridge, Saltash Tunnel, Glastonbury Tor, Clifton suspension bridge, Exeter Cathedral, Plymouth Combined Court, Penzance County Court, Barnstaple county court and many other government buildings.
The protest will be prior to a march in London on June 16.
Former member Jason Hatch made international news when he scaled the roof of Buckingham Palace and Clifton Suspension Bridge dressed as Batman.
Last year the group disbanded over claims that it was about to kidnap the Prime Minister's son, Leo Blair, but has now reformed in order to carry out its campaign.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereComments are closed on this article