Still remember the lesson taught by my health class teacher (in 1970 I think). He was stationed somewhere in Europe. Sitting in a bar, middle of hot day. High school kid comes in, sits at bar and orders a beer. Is served, pays for it, slowly drinks it, then wipes his lip and leaves. Kids was for sure under 18. Meanwhile, in same bar where two GIs getting blitzed and then puking in the street. Tell me which system works.
Yes we set age limits for many things. But to say you can enter contracts (including marriage) or fight and die for your country, but not drink....come on man, you gotta be kidding me.
Oh and for fun, try pulling the 990s for MADD. Wait until you see how profitable it is for these MADD executives to rail on about drinking. While being supported by the Stealth WCTU.