It looks like the Russell Brand supporters club is starting the develop!
On a personal basis, I find the bloke to be nothing special and am amazed at the air time he seems to get - coincidentally usually around the time he's trying to sell another book.
As far as his appearance goes, he seems to have developed his costume to appear to be an anarchist as, if he was to dress more conventionally, I suspect he would get less attention - just another bloke in a suit spouting meaningless drivel (and we've got plenty of them already)
He decries the capitalist system but is quite happy to use it to make himself money. He decries the tax system and then uses it to fund his lifestyle.
If he was actually trying to do something to help the disadvantaged then he has the resources to kick things into action but he (as far as I'm aware) does nothing.
He is the classic bloke in the pub - criticises everything but has no meaningful suggestions as to how to improve the situation.