Perhaps doing so collapses the universe onto itself. That is why out of infinite possibilities only one universe exists. The rest were destroyed at some point in thier timeline, eliminating the totality of that timeline. All that is left is the one in which no one ever thinks of doing that.

Im currently running a game where one of our guys has a bag of holding shoved up is ass. He tried to say an Alchemist jug that got blown up was in there, but I told him it wasnt, when he put that bag in his ass, he signed up for a whole extra layer of required roll playing.