The claims that the Canning family let her drink are two weeks old. Link. That's one of many links I could provide. The Canning family has not disputed those claims.
Our son drank at home before he was 21 - with us, at dinner. He drank in Italy and Germany too - mid-teens, with friends, at dinner. He was also booted out early on, and we were not friends but parents. Some of us BBs grew up in adulthood.