What can be done about people who are clearly losing a game and leave the game with plenty of time left on the clock. It leaves the winning opponent there waiting until the game ends to move on!
This is a clear case of very poor sportsmanship! Why not just resign and say good game and move on to the next game?
i guess you could also leave the game, but then your opponent might come back and make a move.
This brings up the question, would you wait to win?