Note that this is not the whole point of my outrage, but it's annoying that Dungeons and Dragons is STILL the go-to title for "gaming is evil", and that any tiny tie you can make to it will prove your point.
I think it is the idea of spells that does it. When I was in middle school and playing D&D, my cousins thought it was witchcraft. To be fair there are a lot of spells listed with incantations like..
Upon casting this spell, the caster instantly liquefies the nitrogen in the atmosphere, causing a brief moment of intense cold to all in the area of effect. The intense cold causes 1d6 points of damage per level of the caster to a maximum of 10d6. This spell is basically the exact same as the spell fire ball but does cold damage instead of fire damage.
Be careful not to read that aloud or you might invoke the spirit of TSR and freeze your monitor.