Oh, the whole alcohol thing is a nightmare - do you ban it completely when they are way under age on the grounds that they're not old enough, or let them have some so that they are at least a bit used to it when they start in secret? We have let ours have a bit of very diluted wine or weak lager at family celebrations as they get older.
DD1 is 24 now - if she ever got rat-arsed at a young age she was sleeping elsewhere for the night and we didn't know about it. We had a few friends of hers sleeping here (ie elsewhere for their parents!) who threw up on the floor
- hope she never did the same.
DD2 is 21 - at the family meal for the 18th of a friend of DD1's, when she was 15, she drank a lot of white wine because someone kept topping up her glass and had to come home v early and had a nasty couple of days which at least put her off it for a good long time. She has sensible spells and stupid spells now.
The girls both have friends who drive (neither of them does yet) and all their friends appear to be very good about not drinking if driving - the challenge is getting them to that point.
DS1 is nearly 18. He had a barbecue at home for his friends at his 17th last year and deliberately set out to drink a silly number of bottles of Stella - like DD2 the results put him off booze for a long while and he is still relatively sensible.
DS2 is 13. If we have a meal out he has one bottle of blue WKD (with our consent, obv) and is fine with that for now...
Thing is I do drink quite a lot of wine so I can't say "no, you mustn't" with any authority!