I remember the case of the german rock band Scorpions with the Virgin Killer Album cover that cause controversy in the time the album was released (1976 or 77 i think). Mister Klaus Meine say after he regret use that inappropiate cover..and well i guess everybody knows here that cover (Virgin Killer) was censored in many countries and replaced with a scorpions band pic...well i think i agree with mister Meine that cover was really inappropiate specially if we think in all the pedophiles around.
-Here goes the controversial album cover art: Virgin Killer (censored)

-Here is one of my fav ones/ Judas Priest: British Steel.. i think all their heavy metal is reflective of this cover art...very powerfull...steel sound...is all what heavy metal should be...breaking the law!!!!!

-and this last front cover...i usually don't like albums cover art with the member of the group on it..but in this case..i don't know..SP seem to say "hey i'm on my own now...but still cool and gorgeous" hehe love it

* hope can understand my awful broken english =(