The only real way to mitigate this is for the engineers to force you to drag and drop your pieces as you would in real life chess.
If the game is early enough and a person requests a draw due to a misclick, it can only be good sportsmanship to give them the benefit of the doubt and accept a draw offer.
The player that says "resign and then we'll rematch" after a misclick (aka, a recent opponent of mine) deserves to be blocked because there is no such thing as a misclick in real life chess.
More on proper chess etiquette? I can touch every piece on the board and not be obligated to move the piece I touch. So what's up with that?
in long unrated games i tend to do my best to mimick their misclick to try to even the game out again. for example, if their king accidently moves 1 space instead of castling, i do the same