The 18+ rules are excellent and I fully support the idea, but the system currently in place needs some SERIOUS refinement and bolstering. While having in-person age verification is the best way to ensure that airsoft guns go into responsible hands, it is a major hinderance to the growth of the sport in areas where airsoft is not already prominent.
For example, take a look at Sudbury, where only a handful of people currently enjoy the sport, but a much larger interest does exist. There being no registered age verifier in the region, enthusiasts are forced to travel south for the sole purpose of getting verified.
The system in place would work so well if there were age verifiers everywhere, and I suppose that patience will certainly pay off in that regard - but it is frustrating and it does prevent growth.