Alright… well I used to be a VERY heavy drinker/pot smoker etc. this wasnt too long ago. Anyways drinking/partying in your teenage years can actually be a good thing I am currently in college and there are many people going through that phase of their life during their college years and fucking themselves up royally and flunking out.
where as i went through this while i was in highschool sure my grades suffered etc. but now that i am in college i maintain an 80% average while others party and flunk out. Everyone goes through a partying/drinking phase eventually better to get it out of your system before it can really fuck up your life.
As for why they do it i know for me there was 2 major things 1 was there was nothing else for youth to do that didnt cost money or would last as long as a night of social drinking.
If there were more free/cheap interesting things to do ie. not go play pool (which gets old) or go swimming or to the movies, There simply there isnt enough to do and there is no resource in which teens can use to find things to do.
The second reason I was always partying and drinking or doing drugs was to meet people. Social interaction is pretty much the only useful thing you learn in highschool.
So it is important for teens to get out and enjoy their lives while they have no responsibilities. For those of you against teen drinking i will ask this… would you rather your kid pissed their highschool years away drinking and doing drugs, barely making it through then going on to college to become succesful? or would your rather them wait until they hit college leave home and experience their new freedom and piss away their much more important college years?
Drinking and drugs can become a problem and parents have to watch out for that. Thats what it all comes down to is the parents if your kids out having a good time on their weekends and partying let them but dont let it become a problem.
For me it became somewhat of a problem i found myself slowly being surrounded by more and more hardcore drugs etc. ie people trying to push me into doing coke etc. which is what woke me up and made me snap out of it. Unfortunatly it is not the same for many others, many of my good friends are now totally fucked up because it just didnt click with them for some reason. It is a parents job to teach their kids when they are in a situation to stop and think “whoa these guys are doing fucking cocaine what the hell am i doing here” sorry about it being long winded thats just my 2 cents