Reading creepypastas. I'm pretty sure they're meant to be creepy, but I find them absolutely hilarious. In the comments everyone's like "OMG SO CREEPY" and I'm like "LOL SO FUNNY". Yay.
Bad ones are like that, and a lot of them are bad. I like to read them too but I hate myself for it afterwards (if I stumble upon some good ones...)
Hide and Seek Alone isn't a creepypasta but still makes me uneasy.
Well... Dramatical Murder and online Hogwarts schools. (I'm not a HP fan, I just love to study things like that.)