Even before this touch tunes shit, the bar tenders would have some basic control over the machine. Or just simply unplug it if you pulled this kind of shit. And if you kept doing it, they would kick you out of the bar. And/or security or a group of regulars would make sure you had a very unpleasant time, and would not want to come back. What fantasy world do people live in, where they are so out of touch with real world consequences.