This is also a line in the Dead Kennedys song "Chickenshit Conformist." It's meant to criticize the fashion punks in the mid-80s hardcore scene around the SF bay area. They would come to shows, beat people up, and be a general disturbance. They held none of the beliefs that real punks held sacred at the time.

On top of that, they would give people shit because they didn't have a 3-foot mohawk or weren't wearing ripped leather.

"Harder core than thou for a year or two,
Then it's time to get a real job.
Others stay home, it's no fun to go out
Where the gigs are wrecked by gangs and thugs."

That Jello Biafra was quite a lyricist.