>>952707
Backmasking. Judas Priest actually got dragged to court over it, so it was taken seriously at one time.
Also I remember Ralph Bakshi's Mighty Mouse being censored because soccer moms thought Mighty Mouse smelling a flower was a drug reference.
We should also count Jack Thompson in that category, there were a moral panics over Doom, Mortal Kombat, and GTA. And Night Trap, Custer's Last Stand, and Death Race.
We should also remember Dr. Wertham and Seduction Of The Innocent.