I was going through Korchnoi's best games collection and recall one position in a game that he was winning where he made some disparaging remarks about people showing a lack of respect by not resigning when they are clearly lost.
What was funny was that after that I went through Keres's best games collection and he had a game against, you guessed it, Korchnoi! Korchnoi was lost and Keres' made a similar, but much nicer remark, on how Korchnoi could have simply resigned instead of playing on. And yet Korchnoi played on.
But then again, in neither of these positions was the opponent down by a rook or more with nothing to show for it.
Salaskan,
Perhaps your opponent does not realize that you have already "won" the game. I recently played a game where my opponent at one point was "down a rook", and I actually thought I might have a chance to beat him, but he ended up the winner. Beginners don't necessarily have a clue when they have reached the point where they cannot win. Perhaps this is also true of some intermediate players? Using your yardstick, I should not even start any of the games I've been playing, because I am a beginner playing against a seasoned and skilled player, so every game is lost before I even make my opening move. Should I resign? Or should I keep trying to beat him and be grateful for his endless patience?