Wow this thread is still going.
Fluffy, you do have some point to what to say, but some of what you say doesn't make sense. Yes, kids will get the hands on airsoft one way or another, but we shouldn't ENCOURAGE them to do so even more, hence the reason why retailers shouldn't sell to minors. (As for clubs/fields, they are welcomed to invite minors, but at the end of the day, it's still their choice)
Yes, like alcohol, cigarettes, and gambling, society does not want minors to have any part of it, do you consider that prejudice? And if you think about it carefully, these are the same reasons why airsoft take on a similar approach. There will be kids who drink, smoke and gamble out of their mind, but as long as MAJORITY doesn't, that's what laws/regulations are trying to achieve.