Sheehan Lygren, 22, of Milton Mills, who pleaded guilty to misdemeanor counts of indecent assault and resisting arrest Monday, said he was protesting the working conditions at the downtown restaurant, where he was employed until the July 12 incident, the Portsmouth (N.H.) Herald reported Tuesday.
"I'm a free-spirited individual and sometimes it gets me in trouble," Lygren said after entering his plea.
Prosecutors said Lygren walked into the restaurant nude July 12 and fled through the Vaughn Mall when a police officer gave chase.
Lygren was fined $1,000, with half suspended pending a year of good behavior, and a 30-day jail sentence, also suspended for a year. He was also ordered to write letters of apology to the restaurant and the police officer.