I'd go so far as to say the "Age Verification" system is careless!!!!
Selling Airsoft guns to someone under 18 is ILLEGAL in Canada. If you sell a gun you should be verifying age at time of sale, not relying on an internet (internet!) forum with a little "Age Verified" tag under someone's name.
Seeing the "Age Verified" tag might make you less likely to verify age at the time of sale. In that case if the person you're selling to is under 18 you've broken our laws.
The age verification system probably started with good intentions (or possibly this was started by a retailer who wanted to make the classifieds more difficult to access ;>) but it's most certainly misguided.
Plus it's annoying - I want to see some Airsoft porn in the classifieds but I can't because some random kid hasn't checked my id
The funniest part for me is when I decided to buy a used Airsoft gun in Canada the kid I bought it from turned out to be 14 years old. I was expecting at least a 20-something but nope, I went to meet up and see this 14 year old kid. Don't get me wrong I'm not knocking the seller (he was a really good kid), but it kinda caught me off guard!