Whilst I would certainly agree that teenagers should not drink to excess, this piece of scare-mongering propaganda in the Telegraph can be neatly summed up by two quotes (one by an arch neo-prohibitionist) it contains:

We’ve seeing (sic) a slight decline in the number of children who drink – Don Shenker, total arse and Chief Executive of pseudo-charity Alcohol Concern

I am pleased that these statistics show a decline in the number of young people smoking, drinking alcohol and taking drugs - Children’s Minister ‘red’ Dawn Primarolo

Edit: The excellent post on Pete Brown’s blog rips the Telegraph’s alarmist article to shreds.