I understand your rationlisation but the smoking example is way off the mark. Both my parents smoke, all their lives infact, but not once have I or my brother touched a cigerette. On the flip side neither of MY parents drink, but we both enjoy the occasional pint.

The violence in the UK Cities right now is a result of the social and economical enviroment these kids grow up in. Gangs have neer been cooler, violence has never been so indiscriminate and clinical. Theyre are no rules or boundries in a group of youths fighting. You cant solely blame tv, schools, problematic childhoods, theyre all excuses.
The British Government has let down the whole country. Educational, Law and Order, including the Judicial system has repeatedly let down the general public.( Including me - I was the victim of a stabbing some years ago) If these youths were punished as they should be, some, not all would think twice about there actions. WHERES THE DETERRENT?
Responsibility has to start with the individual.

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You can laugh at me all you like because I have Alzheimers, .......but at least I dont have Alzheimers