If you are referring to the "banned from the classifieds" or "no longer an age verifier" titles. Those are a part of the public information service provided. Considering if someone does not look frequently at the tags, they may forget that said person is no longer age verified or a verifier and enter into negoriations that are against forum rules unknowingly.
Don't like it, meh its not your house you are trying to keep clean.
As for second chances, some people have been given second chances more then once and blown it. Unfortunately when this happens as much as it has then those people ruin second chances for everyone else. This is the same everywhere, not just on the internet but in real life.
Saskatchewan Age Verifier! Contact for more Info.
http://airsoftcanada.com/showthread.php?t=174161 - Honour & Respect your fellow players! #Airsofthonourandrespect