In addition to Hawk's post, check this out:
George Carlin's 1972 arrest photograph.
"Carlin was present at Lenny Bruce's arrest for obscenity. According to legend the police began attempting to detain members of the audience for questioning, and asked Carlin for his identification. Telling the police he did not believe in government issued IDs, he was arrested and taken to jail with Bruce in the same vehicle." (from Wikipedia)