^^
That's true to a point -most chavs are born into a culture of chavdom, and I totally agree that, in those places, most people are 'soft-chavs' by default (wearing pink knockoff Juicy tracksuits and a lot of Kappa, white puffa jackets, gold chains and burberry -drinking white lightning).
I do think it takes effort to be a hardcore chav though -because it's a state of mind. It's a state of mind which includes being contemptuous of non-chavs, flashing 'status' items (£350 phones, most important, I have never met a chav who had a phone that was older than 6 months), and, for girls, wanting to show as much flesh as humanly possible -seeing everything as a means to pull (eg, the dummies all the chav girls were sucking a few months ago were meant to imply fellatio

).
That's why there are some affluent and educated chavs -I go to a private all-girls' school, and about half of the year are 'middle-class chavs', who wore Jersy ra-ras with white court shoes, bare legs and Von Dutch caps in December. The Sunday Times Style mag did a feature on chav access (they dressed a reporter up as a SuperChav and sent her down Bond Street to gauge reactions), and used Paris Hilton as their model -and she's certainly not working class.
Choosing to be a chav is different from choosing to be a mod or a punk because mods and punks go into it with their eyes open -a punk knows they're choosing to subvert mainstream trends in a way that most people don't like. Everyone pretty much has the same idea of what punk is, which isn't true of chaviness.
We might see Chaviness as an expression of supreme naffness, tacky flashiness and vulgarity -but chavy people don't get that. They think that they're fashionable, and at the height of cool. It's not so much a trend, but having an entirely different perspective. What they love, I hate, for example -and, accordingly, what I love, they hate.
Whilst this is definitely tied into class -the majority of people with a chavvy perspective are working class, and the majority of anti-chavs are middle class -it's not a direct product of it, and it's not like chavs are only chavs because they can't afford not to be. Chavs don't aspire to dress in Comme des Garcons, and go to art galleries one day -if they were the richest people in the world, they'd just buy real louis vuitton and burberry to replace their fakes. Case in point -Victoria Beckham, and Coleen MacLoughlin.
Obviously I've generalised a lot -and mean no offence

. I just think that most chavs would be astonished to find people leaping to their defence -if you don't own a burberry scarf and a LV murakami bag, it's not like you understand fashion anyway...