I don't get why people watch MLP and they get all like, "THIS IS MY LIFE I AM TWILIGHT DARKNESS BLA BLA BLA FRIENDSHIP!", because they watch a show. I watch it, yes, but you don't see me running around having pony Minecraft skins, making pony add-ons and suggestion topics, and getting cutie mark tattoos. It's as healthy as watching any other show if you don't let it get out of hand.
TL;DR: Shut up and watch the show without making us feel uncomfortable by become a pony obsessive.