In the 70s and 80s, back when vinyl was still king, various Christian right types (and the Parents Music Resource Center) made a lot of noise about how rock bands (including, notably, Led Zeppelin) were supposedly promoting Satanism through their recording via backmasking, the process of recording something backwards that is meant to be listened to forwards. Rappers frequently use backmasking to censor dirty words on the “clean” versions of their songs, but back in the day rock bands used it to embed subliminal Satanic messages in their music. Or so Tipper Gore said.
It would have been funnier if time and resources hadn’t been wasted on proposed state and federal legislation seeking to eliminate or regulate recordings involving backmasking because, as the 1983 California bill said, it “can manipulate our behavior without our knowledge or consent and turn us into disciples of the Antichrist”
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NAMBLA is the acronym for the North American Man/Boy Love Association “a pedophile and pederasty advocacy organization in the United States that works to abolish age of consent laws criminalizing adult sexual contact with minors.”