Sons of Struth, which has carried out a series of protests against the Rangers board, closed their site yesterday.
It comes a day after lawyers for Rangers director brothers Sandy and James Easdale wrote to the group about allegedly offensive comments posted online.
As reported in the Evening Times, Sons of Struth said lawyers for the Rangers board members ordered them to remove posts from three individuals.
Sandy Easdale is chairman of Rangers Football Board, and his brother James is a board member.
Sons of Struth spokesman Craig Houston, said: "It saddens me to notify you that until proper legal advice can be obtained, then the Sons of Struth Facebook page will be taken down for an undisclosed amount of time."
He added: "Until full legal advice is taken, I can't leave myself open to threat of action against me."
Mr Houston, who formed Sons of Struth last year, is a life-long Rangers fan. The splinter group has organised demonstrations and protests aimed at the Ibrox hierarchy.
A spokesman for Rangers said they would not comment on the issue. But he did confirm a letter had been sent to the Sons of Struth fans group.
The fans' group confirmed they received a letter from the brothers' solicitors on Tuesday.
It read: "We received a letter from Peter Watson, solicitor advocate of Levy & McRae acting on behalf of Mr and Mr Easdale.
"The letter asked us to remove posts from three individuals."