To clear shit up for the whole "mature enough to play" argument:
The 18+ rule is not based on maturity. It is based on liability.
When places say 16+ with parental permission, why do you think they ask for a signed waiver?
Does a signature from a parent that prove the kid is mature?
No. It says that the airsoft field wont get sued because the minor didn't have the mental capacity to understand the possibility of injury while engaging in the sport.
If you are 18, you are responsible for your own actions.
If you are younger then 18, someone else might have to.
Airsoft fields and players do not want that responsibility, so we have the 18+ rule.
God is a /b/tard.