Anti-eviction activist Ben Gilroy has been jailed for three months by the High Court for failing to comply with a community service order.
The court found there was a deliberate and conscious breach by Mr Gilroy of the order made in October 2017, after he admitted criminal contempt of court.
Mr Gilroy had made a sworn statement in proceedings by Allied Irish Banks, to enforce a €3.2m judgment against another man, in which he accused the High Court of criminal intimidation and threats and compared the action of a court to that of "a thief putting a gun to his head and robbing him of his wallet".
He also alleged he was threatened by "members of a semi-secretive society wearing wigs and black cloaks" who believe they are "superior to other members of society" and who "act in a clandestine fashion to hide their criminality".
Mr Justice Brian McGovern said Mr Gilroy had also accused a judge of being in breach of his oath of office and of taking part in and allowing criminal activity to take place in front of him.
The judge said his affidavit also contained further threats against a judge, solicitor and counsel for AIB.
Mr Justice McGovern said the sworn statement was a direct attack on the court and the administration of justice and was calculated to bring the administration of justice into disrepute and diminish the authority of the court.
Mr Gilroy admitted contempt, apologised and said he was willing to undertake community service.
The matter was adjourned and an order made in October 2017 directing him to complete 80 hours' community service.
This morning, the judge heard that Mr Gilroy had not performed any community service.
Two probation officers agreed that he had told them he was willing to do the service but that he had raised issues alleging AIB's title on the court order was incorrect and had also referred to a Supreme Court appeal.
Mr Gilroy told the court he was willing to perform the community service. He said he had turned up for every meeting with the Probation Service and had contacted charity shops about hours for service.
But he said his difficulty arose from the order made in October 2017, incorrectly identifying the title of AIB.
He referred to an issue about a comma and said it was a very serious thing to ensure true title and he wanted the order to reflect the true title.
Mr Justice McGovern said there was no appeal against this order and he was not concerned with any order.
He said he had been lenient in not sending Mr Gilroy to jail, but he was quite satisfied there had been a conscious and deliberate refusal to comply with the order and he must serve a three month sentence for failing to comply.