Every chess player has experienced this at least once in his life: An opponent who refuses to resign, even though being bare-kinged against a rook and 5 pawns...
Usually, kids are told to not be tempted and mate in the most efficient way (with the positive side effect that they're not encouraged to develop a personality that humiliates others).
However, playing on in a hopeless position is very provocative. It says "I think that there is a realistic chance that you do not manage to win despite this huge advantage!". They play on, hoping for some miracle (i.e. flag fall / stalemate).
Is it wrong/bad etiquette to overkill the opponent, e.g. by making 5 new queens?
Aren't they begging for the chances? The game will be at least a tiny bit more interesting for the winning side, as they need to be careful not to stalemate or let the flag fall.
Or is it cruel, arrogant and humiliating to do this to the opponent?