Obviously there could be a few random idiots out there who do that, but well, yeah, it has nothing to do with actually playing D&D so, boring though it may be, it shouldn't be blamed for people doing stupid things.
D&D is all about sitting in a basement at a table and rolling dice. Not running around in the woods with toy swords and summoning demons. You don't get like... a box of props like Glenn apparently got with C&C... you just get... a book, character sheets, and a bunch of dice.
I suppose there may technically be spell casting in it, and I can understand being 100% against that no matter what, but in C&C they were uttering actual demonic incantations or something. In D&D you'd just say, "Oh, okay, I wanna cast a firaga spell on that orc." And the storyteller guy says, "Alright, roll 3 dice, you have to get over a 4." *rolls and gets all ones* "OH NOES I BOTCHED!" Storyteller: "You try to cast the spell on the orc but YOU MESS UP AND BURST IN FLAMES!"
So... yeah.