No, it's against the law. If your child got in a car accident, died, or something else, it would fall entirely on your shoulders, but it is against the law, and I do not break laws (or I wouldn't work where I work). I think it's irresponsible because you are teaching your teen that it is OK to break laws, and if you teach them that...what other laws are they going to break? I would rather teach my child if he/she goes to a party and happens to drink, then to phone me. Always, my kids can phone and I will go get them...but under no circumstances would I give alcohol, cigs or any other under age substance to my children, or support it, or allow it in my house.