They’ll lose. You can’t buy alcohol until you’re 21.
And a higher age limit has been repeatedly upheld by the courts.
Then raise the voting age (and enlistment age) back up to 21 - if one can't be trusted with one responsibility, one can't be trusted with any of them - especially voting...
Good luck with it. I don’t see the wisdom of banning junior from getting his first .22. Yes, you can kill with a .22 or even a pellet gun. But you can’t learn gun safety if you sequestered off from any kind of gun ‘til you’re 21. I taught my kids how the mechanics of guns work, and what makes a bullet fire when they were little, by showing them the mechanisms and explaining. Then I warned them to keep their damned hands off the things, and put them away in their closet and locked the door. Never had a mishap. I didn’t get to the point of buying them their first .22, because we lived in NYC, in a semi-rural area, and our neighbors had their panties bunched over me and my guns as it was. You who live down South don’t know how lucky you are.
Alcohol is not constitutionally protected.
18 year-olds have The Franchise, thereby bringing them FULLY under the constitution.
And, re your comments. Funny that. We take 18 year olds into the military, train them to use pistols, rifles, high powered explosives, rocket launchers, shoot tank guns, shoot artillery, and yet they cannot buy a hand gun, cannot buy beer, yet we turn them loose and tell them to kill people in defense of the Republic. Then we do not give one rat’s tit what it might do those their mental part. Will they come home and want to shoot up the block or what. I didn’t after Nam, but then kids today are very much different than when I came home from Nam 47 years ago.