I think this is (or should be) common in OTB club play.
What does it prove? Apparently people in our clubs have the common sense to admit "game over" first before asking for playing out the game. Exactly my point.
Let me guess: Takebacks in non-sparring OTB games (leagues / open tournaments) where the asking side intends to keep the original game going (and thus not have it count as a loss) are not quite as common. Curious!
PS: Nice try to put the blame of a blame game on me. Very meta.