The addiction of Airsoft already eh?
Anyway that would have to be up to the hosts that will be hosting the airsoft games. Depending on the host they can be strict or lenient.
Strict as in no underagers can step foot in the game
Lenient can come and watch perhaps shoot a gun or get shot for fun
In the GTA some hosts will allow a under-age to be the picture taker, usually they tend to be 16 and up, though they cannot play they can put on glow sticks and run around with a camera and take pics
Some hosts may allow 16+ but thats on a very very very tight rope, and there those on the forum that do not like that.
- Pistolero Steve