There's one aspect here too that maybe is being glossed over.
I'd place a pretty sizeable bet that the majority of the unknown minors are after an airsoft gun to "have" vs. one to participate in an organized event with.
That's not a unique to minors state of mind either of course but it is another aspect to note.
If you're an outsider with an AEG but no way to get to games because you're too young to drive and you parents don't play, etc. the temptation to misuse will be whispering in your ear day and night.
Airsoft, where nothing is hurt but feelings.