We are part of a group of friends who all had kids around the same time. They are all hitting their teens or a bit older, and one couple are quite relaxed about their underage kids drinking. Not just the odd beer either, but spirits. How they want to parent is up to them but we are about to have BBQ and a big get together and I really do not feel comfortable with these young teens getting drunk at my house. We didn't allow our own kids to drink at a young age and nor do our other friends. Would it be unreasonable to talk to our friends before the party and basically say, "our house, our rules"? The kids who are legal age do drink, just to be clear, so it is not that case that none of the kids in the group drink.