German club player (DWZ ~1970), kind of idiot
I'm a nice guy in general and will try to be polite and to not breach etiquette.
Sorry, no takebacks. I found it is a psychological disadvantage to allow it. I won't ask either.
I like to play in the 3 0 pool. That's why I don't like to accept revenge matches.
In a "very clearly" lost position, I'll offer a draw before winning on time.
As a rule, I don't play on in dead drawn positions (R vs R, K+h vs K etc.).
Winning on time by playing senseless moves? No. If you do it, you'll lose my respect (big loss!).
As you see, my opinion is that winning on time is only ok within reasonable boundaries.
But I can't guarantee to always follow my "rules" in the heat of the battle.