Many ulta-christians in the 80s (and even some today) tried to tell their children thar KISS is short for Kids (or Knights) in (the) service (of) Satan, and KISS, as proven hereby, is a satanic, evil, virgin-raping, children-eating rock band.
Even some friend of mine, aged 23 (I would consider this as an age where one should be a bit open-minded) told me about this, and about backward messages in nearly every rock record.
I am a christian myself, but, as i am not weak and got a working brain, i am not controlled by music. I enjoy listening to Immortal, Dimmu Borgir or Venom, and i am not posessed by Satan.

Kiss' Gene Simmons made fun about all this in the KISS-fan-movie Detroit Rock City, whrer the mother of one of the heroes is the leader of a organization called Mothers against the music of KISS, propagating this non-facts and burning their kids KISS concert tickets.