Yes, there are just as many parents who allow teenagers to drink alcohol. Many times, they are the same parents.
Each one of my kids had students in their grade school classes who brought marijuana to school to share and sell, that they had taken from the jar that their parents kept on the Dad’s dresser. The first time it happened, there was one girl bringing alcohol to school and another bringing marijuana and I reported both, not the names, just the fact that it was happening in the girls room. The principal told me that he would do something about the alcohol, but not the marijuana.