4. Arkham Asylum - The Batman Comics
"Oh, it'll be fun! All the criminals are locked up! We'll be safe." Well, first, maybe you deserve to have your treats tricked if you're treating an insane asylum like a candy zoo. And second, have you forgotten that Arkham Asylum has one of the worst track records in keeping criminals locked up in comparison to pretty much any other institution that's ever existed, ever. The fact that the guards are constantly being replaced because they're either A) Idiotically corrupt B) Maliciously murdered should be warning enough. Does it have that
perfect atmosphere for a haunted house? Yes. And I credit that to housing psychotic super-criminals who aren't beyond wearing the skin of trick-r-treaters because you're not supposed to wear white after Labor Day. Do you really want to play a game of trick or treat with the Joker? Because the trick is that you die; the treat is that at least you'll be smiling.