This is such a non-issue primarily because it's a fairly common occurrence. If you haven't ever mistakenly done this or had it mistakenly done by your opponent then chances are you are fairly new to the game. Generally people know that these things are mistakes and they roll with it. If you have an opponent that seems to be blatantly doing this (or a number of other more significant things) then you should say something and/or call the TO over. If said player is pulling something the TO should know. If they repeatedly pull stuff and have been warned then the TO can disqualify them from the tournament if it continues.
That is the only way you can handle this type of situation. Minor accidental transgressions are impossible to avoid. Expect it to happen and deal with it if someone is being shady. You can tell the difference.
You cannot go into a tournament setting up some sort of ground rules warning people that these common types of accidents will warrant punishment. You are creating a tense and unenjoyable atmosphere for no reason.