Patience -it's all in the Game

[Turner]

It should be stated that there is a big difference between quitting a game because you are losing, and quitting a game because you find the gamey exploitation of the limitations of the game system one's opponent employs to be distasteful, and they refuse to stop despite appeals to both common sense and personal honour.

This is a valid point imo and I wouldn't want to play against such a opponent either. Where to draw the line though could be debated but historic gameplay should be sortof a gentleman's agreement imho.