It takes effort to be a chav - work hard at being dumb, don't give a bent tuppence for anyone but yourself, even then try and get someone else to look after your interests for you (usually the State/taxpayer), belligerantly anti-social... and it's not a class thing - there's plenty of middle-class chavs, too, and working-class non-chavs. It's more an attitude problem than a social grouping, imho.