If you're a fan of Yu-Gi-Oh!, I highly recommend watching out for this user:
www.deviantart.com/nathanlapid.
This one is a bit of a strange case, as I'm not sure if he's a bot or an actual user who just has bizarre habits. He will favor a random YGO drawing of yours 16 times across multiple folders, and all of his folders have no chemistry to them. They're just variations of his user name.
www.deviantart.com/nathanlapid…