My first and probably worst username ever was Doo Doo, a family nickname. We don't refer to feces as doodoo in Australia so at 12 I thought nothing of it.

Nowadays I go by Daniel San, danielamos, nomoremaybes or sometimes in games as Doobat. I'm not that imaginative.

Keep in mind that reality shows often script things like this to keep the show interesting. My guess is that the producers had a word to the check in guy to pretend that she didn't have her ID and to show the sash for a bit of ZOMG LULZ factor, but off camera she did have her ID and checked in fine.