I've heard about them, and seen some youtube videos about it, but I've always been curious.
Are they a big no no? Can you get banned for trying to get them? There's a few I like, like Spiderman Amumu, but I don't want to risk getting banned.
It's technically against the contract you agreed to which was to never mod the game, but I don't think Riot cares as long as you don't make you skin give you an advantage of some kind (keeping in mind only you will be able to see a custom skin you're using).
I think riot somewhere along the lines said that custom skins are fine. So long as its not somehow giving you an unfair edge or affecting the experience of other players I believe its fine to them.
