tomtryto, with all due respect, you need to get over what you think is good manners in chess.
Whatever moves the opponent makes has absolutely nothing to do with good manners. Either the move is legal or it is not. Morales and ethics are not involved. See: legal or illegal.
Now, if we are to quibble about morals and ethics, then I propose that it is immoral in an OTB game for an opponent to be snacking on potato chips while I am trying to think. Or burping. Or loudly blowing his snoz. Or tapping his foot. Or shaking the table. Or coughing across the board. Or...
Footnote: I don't mind if he is peeing in his pants. Seeing such, I know I have a won game...lol.
well it's not so bad if you can avoid a repeating situation, or cause a draw through the three repeat rule, but I still say what happend to manners. We shouldn't have to have the three repeat rule. It's just basic respect!
that makes calculation very important if you are winning, don't give your opponent a change to repeat moves - because he will do it. - in order to prevent losing.
it has nothing to do with manners. everybody is on his own as soon as the game starts.
use tactic trainer each day and at some point you learn to calculate to prevent that your opponent has a change to prevent repeating moves. - and you will at that point enjoy the challenge.
if I am in a completely winning position I look out for danger. Does my opponent have a stalemate trap. does my opponent have perpetual check. cause one bad move will give my opponent a draw. - and that hurts in a completely winning position.