I do believe that these protests are legitimate and could bring about positive change. It was effective as in it finally got the world's attention. It may not be exactly constructive, but I hope it would be in the long run.
I completely condemn much of the random muggings and shop burnings, but call all (or even most) of the rioters apolitical is false. One rioter was seen walking off with a flat-screen TV, when asked what he was doing with it, he replied that it was his banker's bonus. This idea that all the rioters stole was luxuries is false, people were seen taking nappies, toilet paper and potatoes. And so what if they stole luxuries, we live in a society that tells us that our worth and dignity is based on what goods we own, on 'keeping up with the Joneses'.
These people have had their benefits, education and welfare cut. In some of these areas, the average number of applicants for a job is almost 60. Now with the recent austerity measures, the Con-Dems are cutting even more and now the rioters are going to have what little benefits they taken away (wow, Londoners want another riot almost straight away!). This idea that the rioters will now face the full weight of the police and the law is false, since 1998, over 330 people have died in police custody, yet not one officer has been charged. These people have had their education funding cut and now with a rise tuition fees, it will be almost impossible for people to get an education.
Put this up against the MP salary scandal (and numerous examples of British MPs cheating and defrauding tax payers), corruption within the Met, Scotland Yard and Parliament, the News International scandal and Cameron's friendships with Coulson, Brooks and Murdoch. See when the British government bailed out the banks who promptly gave themselves huge bonuses. So much news was made of the fact that David Cameron had to cut his holiday short (oh, poor him, how many Brits can afford a few weeks holiday in Tuscany? Also, shouldn't he be at work during the largest financial meltdown since 2008?).
750,000 people workers and students protested earlier this year against the austerity measures yet nothing happened. I wish the violence was better directed against banks, police and Parliament, but at the very least, the riots have shown that a large section of society is disillusioned and annoyed at the way their country is run. I'm sure fiedler and Gunfighter will talk about how I'm living in some fairytale land full of unicorns and rainbows, completely ignoring their own fairytale land of centaur's, von Mises, elves and the invisible hand of the market.
A few videos:
http://www.youtube.com/watch?feature=player_embedded&v=biJgILxGK0o
http://www.youtube.com/watch?v=G18EmYGGpYI