Obviously this is a joke, but there used to be an important reason we kept the flags wrinkled like that: it meant that you never knew who had bought a flag at a Pride event and who brought one they owned.

This meant that people who were 'caught' at an event by friends or family they weren't out to, they could say they just bought the flag to support the cause. It also meant there was no way to tell who had been there longer than others.