Plenty of “questionable” album covers, though I would classify them as of their day not as bad. Ones that immediately come to mind include Blind Faith’s self-titled album and Hendrix’s Electric Ladyland, neither of which I wiuld dare let my parents see when got tgem, still a teenager living at home. A few others fall into a similar category, perhaps including the Scorpions’ Lovedrive. There was also Bow Wow Wow’s album See Jungle, but compare to the others it was tame.
Then there’s the Edgar Broughton Band’s eponymous album, displaying cow carcasses in an abattoir, which these days might offend the vegetarian-vegan movement.