A lot of airsoft forums here in Canada are starting to restrict their buy/sell areas to 18+ or verified members, and not allowing just anyone into them.
Just for the simple reason, that none of the site owners want to be held responsible for a minor buying and getting caught with an airsoft or other questionable item and saying well I bought it from xxxxx.com site. NAR does as said have several items in it that minors should not have easy access to, not airsoft related hence the NAR.
Saskatchewan Age Verifier! Contact for more Info.
http://airsoftcanada.com/showthread.php?t=174161 - Honour & Respect your fellow players! #Airsofthonourandrespect