The best evil is a remorseless evil, or evil with a smile on its face. That's why the Joker is such a lovable character, we love to loathe him. Pinkie Pie is the perfect cover pony she doesn't look like a killer, which fools everypony. For example, did you know the Ed Gein, the inspiration for the Texas Chainsaw Massacre movies also babysat children at his house, where not a few meters in his shed were skin upholstered chairs, face masks, carved off cleavage, skull bowls, to name a few. And yet this man took care of children... So if it happens in real life, why not in MLP? Most of it's slice of life anyway right? So things like Cupcakes are normal and make sense if you're making slice of life stories. Man I should go over to Plainfield sometime... sounds like an interesting place to go to without going out of state.