I have a cousin that is a bit of a rebel etc. She used to take bottles of beer from the fridge and has been known to take a bottle of vodka from her sisters room.
She is 16 now and left school. She is now allowed a few bottles of beer at weekends etc. and is actually drinking less because there isn't the thrill of doing something she isn't allowed. She acts more reponsibly so she gets more respect from others and is given more lee way.
If my family or anyone in authority tried to bad her from drinking (or anything else for that matter) she would be far more likely to rebel against it. I have a few other family members that were exactly the same in years gone by.