See, this is the thing. It’s just like the how Dungeon and Dragons scare back in the 70s and people came out of the woodwork to condemn it for “poisoning children’s minds.” And all because some kid killed himself because his character died in a Campaign (actually, there were more stories but that’s the one I remember most.)
Point is, some people are mentally unstable and they’ll take something, anything and use it to spread their hate, either for or against it.
But these crazy people are their own responsibility. Or those who have direct responsibility over them, as the case may be. That responsibility is NOT on the creators of the media. Not unless something in their works DIRECTLY instructs people to behave as such. In that case, yes it’s the Creator’s responsibility.
But for these people, if it’s not WoW or DnD, it’ll just be something else that sets them off. If it wasn’t WoW, you’d have Warhammer, or Harry Potter, or My little Pony… Something that these people will find to latch onto and turn it into something awful.