Two men have been charged with the criminal damage of a US navy aircraft at Shannon Airport last night.
'Danger, Danger Don't Fly' was scrawled in red marker on the aircraft.
Dr Ed Horgan, 71, of Newtown, Castletroy, Limerick and 35-year-old Dan Dowling of Grace Dieu, Waterford, appeared before Ennis District Court.
Judge John King told the pair that "this is a serious charge and has the potential on conviction of a prison sentence."
Dr Horgan successfully argued against garda bail conditions that he remain out of Co Clare and sign on daily at his local garda station.
He said he has no previous convictions of any sort and needs to go through Co Clare as part of his work as a part-time university lecturer.
He added that it will not be possible sign on daily as he will be travelling to the European Parliament on 25 May. He said: "I see no reason why I have to sign on daily."
After listening to Dr Horgan's objections, Inspector David Finnerty told the court that Dr Horgan remaining out of Shannon Airport and town would be sufficient and that Dr Horgan can sign on once a week at his local Garda station.
Garda Carmel O'Malley said that she arrested both men at taxiway 11 at Shannon Airport at 22.40pm last night.
She said Mr Dowling had nothing to say after caution and that Dr Horgan replied "not guilty of any offence".
Mr Dowling said that the bail conditions to stay out of Co Clare and sign on daily were harsh.
Judge John King said that if he breached any of the conditions, gardaí could bring the case back before the court.
Both men were remanded on bail to re-appear before Ennis District Court for directions from the Director of Public Prosecutions on 7 June.
Speaking to reporters after the brief court appearance, Dr Horgan said he handed in 35 pages of a list of 1,000 children killed in conflicts involving the US in the Middle East, Asia and Africa to gardaí at Shannon after his arrest last night.