Besides, with online chess, the machine is already pressing on the clock for you, writes down the moves for you, don't allow you to play any illegal move and so on. It turns players into vegetables, and next, the machine will suggest you a move to play, so you don't have to think nor waste time into a "futile game".
Not to mention you don't have to worry about the touched piece rules... Plenty, yeah, so.
Plenty is no ground for setting rules.
Otherwise, the promotion rule that did not make it clear you must pick a piece of your own colour, would never have been changed into you must pick a piece of your own colour only. Because the plenty was on the side of games where the problem never occured, that picking a piece of your own colour or not was a game changer.
If you google it, you'll find it, but it actually happened a couple of times , that in prized games with money at stake, a player won a game by delivering a checkmate that occured out of that weird, but legal choice: promote your pawn into a piece of the opposite colour.