Lots of reasons I suspect for why?, from not being an ideal consumer (left economically on the sidelines) to many not getting a decent sh*g (lack of bling, bling as portrayed in 50 Cent Gangsta rap music videos and the like). This can be observed in any nightclub with the iPhone mating ritual displays. iPhones and bling are expensive and tend to be out off the reach of the economically deprived.

http://www.youtube.com/watch?v=IyPzGUsYyKM (you will need a couple of hours free time to get an idea of the comprehensive manipulation of society through electronic media and propaganda i.e. Public relations)

Constantly complaining from the Politicians this side of the Atlantic that the rioting is just nothing short of rampant criminal behavior by the so called 'criminal classes' is just a cop out (excuse the pun). Again this is just public relations for their own failures and incompetence. Sometimes its a little difficult to know if they are talking about socially pointless banksters or socially irresponsible teenage looters or arsonists.