Doonesbury by Garry Trudeau for September 10, 1973
Transcript:
B.D.: Harris! Put that joint out! Harris, put it out or you're off the team! You're having a bad effect on the rest of the guys! Man: It's true! Zonker's setting a terrible example! I'm... I'm about to succumb! Man: Me, too! I can't take the peer group pressure any longer!
Smoke ‘em if you got ‘em.