It seems like in many events with gear requirements, someone shows up in some really stupid, nonsensical stuff. Like shorts or sweatshirts, or (and I saw this one once) lime green bike helmets. They tend to be kids, and I know that maybe they can't afford it, but it really seems like anyone who shows up wearing that sort of thing causes issues.
I'd really like to see stricter gear requirements at events to maybe weed out a few of the "Backyard Warrrzz" types.