i drink my fair share…its not necessarily a matter of when and where a kid drinks as much as how and why. for example if a kid drinks in his dorm because he enjoys it then who cares. if a kid drinks at a club because hes drowning his sorrows then you have a problem. personally i think any problem you may have is simply a lack of awareness about alcohol and lack of proper education. i was brought up in a heavily anti-alcohol house. i drink moderately now, and only when i know that i have no responsibilities the following day, and i know that i will not need to drive any time soon.
kids are going to drink…when did you start? wanna avoid problems? talk to your kids about it. let them drink some booze at the shabbos table under your supervision. give them an idea of what responsible drinking is.