LUKK is a disgrace for chess. He wont resign totally lost games (e.g. K+Q+Q - K), using maximum time to let the game last as long as possible
You're right, here on the site we have a similar situation with the anti fair play behavior of @Sexxy_Bunny, so I don't want to play with her anymore (if she's a woman at all, and that's very questionable ) even though I outclassed her 4:0 in our last four games.