I think that was a saying that followed the Vietnam war, with the whole draft thing… people definitely didn’t volunteer for that, after which the drinking age was increased.
It should be 18 or less. Kids need to learn how to handle alcohol responsibly instead of having these rebellious chug sessions simply to stick a socially unacceptable middle finger at mom, dad, and the po-po, then going out driving intoxicated when they’re still pretty much learning how to drive…