I would suggest let the kid play paintball first. Then move onto Airsoft as their is a more maturer air about it when I transferred from paintball to Airsoft. Not saying Airsoft is perfect but just my observation so far.
Often most people change from paintball to Airsoft due to the crappy attitude they get from other players and paintball staff at the fields so they want to play in a more mature environment. Probably by then they'll be mature enough to accept rules and play honorably.
Not too sure what else can be said about the Crapsoft that has not been said. I guess just refuse to buy anymore from Walmart/Canadian Tire and wait awhile to get the better items.
- Pistolero Steve