Quincy and the punks

Wasn’t Quincy everyone’s favourite medical examiner?
He certainly was quite the man, noticing foul play where others didn’t, haranguing the police, arguing with his boss, solving the crime and hitting on the victim’s widow. Every episode.
In this clip Quincy gives the 911 to the scourge of society: punk rock kids. In return for trying to stop a girl being pushed into a codeine overdose, Quince feels the crowds wrath with several stock anarchic epithets aimed his way. How come they spat on Henry Rollins, but not the square in the sweater?