Well, it is a "western" form of "fun". Should this prank travel to the eastern countries especially from the part where I come from, the males would get punched at several places with their faces reserved for the flat soles of ladies' shoes to do the final job. For females to go pant-less in public in eastern countries, it is simply out of the question.
The easterners are bound by laws of culture, tradition, morals and morality. Nudity in any form in public is totally unacceptable. If any such case is found, the person lands up in the lunatic asylum.
It is as simple as that!