I was a teenager once. No, really. I did all sorts of things that would be considered unsafe...I lit off .22 blanks with matches, lit firecrackers in my model Helos to simulate rocket hits, mixed all sorts of alcoholic beverages in a canteen so my folks wouldn't notice the little bit of booze taken from each one. Heck, I even had an rifle in my car when I was 16...and no, my folks didn't know about it. Talk about a pucker factor the friday night I got pulled over.
But guess who would have gotten in trouble if I'd done something "stupid". My folks.
Or the parents of the folks at whose home I was visiting.
Maturity (or lack of) has nothing to do with whether minors can or cannot play in the AA games. It boils down to a SINGLE word:
Liability.
Like it or not, we live in a litigious society (look it up) where folks go to court for **** like there only being ONE Valedectorian at graduation and stuff. It's ridiculous. But it is the reality.
Therefore, if you wanna play, get your folks to show up...and stay. In our society, waivers mean nothing...heck, even if signed by adults, one can almost always get a waiver invalidated.
Since AA is a private group, run by private individuals, 'discrimination' is legal. Deal with it. Start your own group for minor-aged airsofters.
Now, that said, I don't agree with proposed / possible legislation relegating Airsoft guns to the over-18. I was shooting real guns when I was 8, got my BB gun when I was 11 and my first rifle when I was 15.