You will likely need to bring a parent, even if you just want to watch. Someone will have to be able to take legal responsibility for you, even if you do not play. The best way to ensure that the host will permit you to attend will be if your parent(s) attend.
In addition, most minor players in Ontario got to play mainly as a result of their parents being active, respected players. Game hosts are much, much more understanding about minors when the minor is the son or daughter of a good airsofter.
"The Bird of Hermes is My Name, Eating My Wings to Make Me Tame."