Yeah, I recently had to explain that its not a case of treating someone different because of how they dress, as I have no problem with skater kids, emos, goths, etc, as they don't stomp around constantly agressive and abusing people and breaking things and generally being a waste of skin. I'd have no problem with chavs if it was just a case that they wear sports clothing all the time, despite only ever getting exercise when running away with stolen property.
Chavs, sure they have a 'dress code' but its more that they hang around in packs, threaten people, beg in the street, but unlike real beggars, its always for phone money or some cigarettes, and they get agressive when you refuse, if 'I don't smoke' its because I'm 'fookin gay!'.
If you've not seen Devvo at fat-pie.com, he'd give you an idea of what a really nice, smart chav might be like.