I can say the culture has changed in the last 5 years. When i was 16 we would go to the river on a friday night, share a few cans or a bottle of white lightening. We did nothing life threatening, illegal (other than drinking under age), we weren't violent and we had a good time. We couldn't get ridiculouly drunk as we had to be in by 10, all of us.
Now my sister is 14 and she goes every friday with her friends and they get alcohol from all over the place. I brought it them once under the pretence they were having a party and would drink it there with parentl supervision (i know, stupid and naive but i am never doing it again). They lie to parents about whose house they are staying at so they can all get drunk. One of her friends was picked up by the police and taken home in an ambulance because she was so drunk. Her parents grounded her for a week and stopped her going out in the one town she got drunk in
My mum rang up all the other parents and said to them why dont we all agree on a set of rules for them all, ie they are all in by 10, they stay at home every friday, give them a fiver and we will tke them all to the cinema, bowling etc. The other mothers agreed, but now they are all back to going out and drinking because its the easy option on a friday night.
This is becoming rather long winded but there are so many reason why teens drink any how much they drink. Whoever said vodka is now the drink of choice is so right, not sure how we can stop this though, raising alcohol taxes hits those who are legally drinking, not just the underage.
I think there does need to be more moral and social awareness and respect. Teens doin't care where they grow up now as odds are they wont live there when they are older. I'm not convinced its all the parents either. I know you become more relaxed with each child nd i was pfb, but we have had a similar upbringing yet she feels the need to drink every friday night. Though afaik she has done no damage or is violent, its more of the howing off aspect of drinking. plus its exciting to do when you're not supposed to.