Radio,TV and newspapers are asking the question "Why?" with regard to these riots. The allowed responses include 'poverty' (whilst we try not to notice the expensive designer trainers and outfits sported by the protagonists), or how lack of opportunity is to blame (are we really supposed to think that there are less opportunities for young people than in say 1931?). There will be talk of 'communities retaking the streets' (to explain why most of the rioters seem to be black) and how it was the fault of the police over reacting or under reacting, or shooting an armed and dangerous criminal. Invariably someone will say how there is nothing to do (when there is more free entertainment available than in any time in history).
The answer is simple- people loot shops, set fire to cars and cause general mayhem because it is great fun and you are very unlikely to receive any real punishment for doing so. I don't reckon you will hear that argument in the media though.