The NY Times has an article about how some jurisdictions are outlawing "sagging pants."
Since June 11, sagging pants have been against the law in Delcambre, La., a town of 2,231 that is 80 miles southwest of Baton Rouge. The style carries a fine of as much as $500 or up to a six-month sentence. “We used to wear long hair, but I don’t think our trends were ever as bad as sagging,” said Mayor Carol Broussard.
I hate sagging pants and other ghetto-inspired fashion trends as much as the next guy. Even more so because I'm somewhat nerdy.
But is outlawing the practice the way to go? You can make the pants illegal, but underneath non-sagging pants will still be an obnoxious punk who will find some other way to annoy respectable people. There's also the danger that someone will wander into town wearing sagging pants, not knowing about the ordinance, and wind up in jail. That result doesn't seem fair.