the wager(s) stand.
Certain girls have always worn as little as possible, as tight as possible, because they were, frankly, sluts.
Some nicer girls, seeing the sluts get all of the attention, and not realizing it isn't GOOD attention, dress similarly. They don't want to put out, they just want to look like they do.
This has now advanced to the point where exposing full butt cheek in public is now somewhat common. It should only be a quick flash, like you would get when you are dancing, but the sight is there all the same. Thong underwear isn't meant for ease of access, it is meant as advertising. Unfortunately many thick-headed teenage girls don't full understand what they are advertising for.
While it wasn't stated in the article, I would be willing to bet that there have been dances prior to this one and that the "thong underwear" flashing has led to some eye-brow-raising dance floor moves.
Personally, I would never let my teenage girl out the door dressed like that. Teenage girls, though, have been known to change their clothes once they are out of sight of Mom and Dad. While I would be against the school actually raising the skirts of girls as they entered the dance, I would be totally supportive of them sending the little tramps home if they flash on the dance floor.
So am I a Nazi, or what?