Dude, there are "satan worshippers" (real people who are a member of a "church" of skeptical atheists that don't actually believe in the devil) and there are "satan worshippers" (fictional boogeymen that congregate to drink the blood of virgins at midnight). Real life members of the satanic church have nothing to do with secret blood orgies or human sacrifice—kinda like how real life people with socialist leanings are not secret agents of the Soviet Union. You're drawing a false equivalence here.In both cases, there WERE a few.
Every satanist I've known (about a dozen) played D&D in high school and/or college. Not all of them did so during the height of the "satanic panic"... because they weren't old enough... but there were Satan-worshippers playing D&D in the period.
And many communist agents were convicted ... including the Rosenbergs.¹
You chose your exemplars poorly.