Most people aren't able to stand out by way of their physical accomplishments, so they attempt to compensate with their outfits.
I wish I was joking, but there is a direct correlation between propensity to have a spiked purple Mohawk and 1970s style American Flag singlet in a meet and having a total of less than 1000lbs as a male. It's one of those things where, if you're ironic enough, it's ok to be weak.
EDIT: And before I upset anyone, there is nothing wrong with being new to the sport/having a low total. There is just no need to make a spectacle of yourself when you do that. It's not to say that having super flashy squat shoes are doing that, but it's more just pointing out how silly some people can be about it.