Wow this struck off quite a nerve. I can see both sides of the coin here- not that long ago (full disclosure- 10 yrs ago) I was under 18 and resented the fact that I couldn't do things that I knew I was fully capable of, however it is much sweeter now that I have bided my time, saved my money and am fully able to enjoy the sport. I do not think retailers should sell, directly or not, to under 18 yr olds nor should games cater to a younger crowd- adults can be childish enough as it is. However the younger members do make a good point- they are future airsofters and we should encourage them to enjoy the sport safely.
How to do this? No fucking clue. Maybe TTAC can have an under 18 night