because it teaches the bad guys how to work the system.
This site is well known to us - the people active in the hobby who have been around a while. Fine. But there are new guys out there trying to scam us everyday. There is no reason to teach them how to avoid detection.
And, since we're talking about it anyway, I will say that the site is phenomenal, and I use it daily. The membership based info is excellent, and it I would encourage any provider out there who is not already a member to join.