Nothing new. At my high school in the 1960s half the teens were alcohol drinkers. I remember parties where everyone was drinking hard liquor, and the parents allowed it. As a 17-year-old, one girl stopped me as we were making out and said "I may be drunk, but I'm not that drunk!" as we were rounding 2nd base. I knew enough to stop when someone says no. One of my girlfriends was 19 when I was 17, and thought nothing of passing around liquor to any of us. At least we weren't on drugs like kids now.
Yeah, I know in NY booze was legal at 18 back in the 60s and everybody cheats by a couple years.
Us Ohio boys only had 3.2 beer, and when we all got to college, those NY kids were hard core alkys.