I haven't had it either, but i imagine in correspondence games this is very frustrating.
Bad sports
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I think that we sometimes misunderstand the motives of unhappy players.
Could it be possible that it takes them so long to move when they are playing poorly because of the massive brain trauma that they incurred upon having made the move that created their downfall?
Could it be that the cause of the poor playing is a result of what is causing them to take longer to make moves (nagging wife for example)?
Before we assume that they are punishing us for their mistakes, we should make sure that the reason for the slow playing isn't caused by some other reason (maybe their dog keeps on biting their hand when they try to make a move and therefore have to wait when the dog is either eating, sleeping, or dead).
Much_Afraid wrote:
Sportsmanship is relative. Sure your opponent is probably stalling the game and I agree with you that it can be annoying but he's really not breaking any rules. I see you have a game where you are down a queen, a knight and 3 pawns and you continue to play. Now that is certainly your right to do so and I'm sure you haven't slowed down but a lot of people would consider that bad sportsmanship. It depends on who you ask, sportsmanship is different things to different people. The bottom line is that if someone is not breaking the rules there is not a whole lot you can do about it.
To right. The time is there for people to use as they wish, if they are stalling on purpose, big deal, they will have to lose eventually.
FAIR ENOUGH !
Thanks for all the comments.
I guess patience is the key then.
CHERRS.
In this case, sportsmanship isn't relative. Sportsmanship doesn't have much to do with the rules, either. You can follow the rules and still behave poorly. Unfortunately, the anonymity provided by the internet protects your opponent's right to act in a petty manner. Just make sure you aren't behaving this way yourself.
theniceman wrote:
FAIR ENOUGH !
Thanks for all the comments.
I guess patience is the key then.
CHERRS.
And you should resign that game 
I guess I have been very luck so far and have not experienced this.