I don't know about that. I have never posted my address or phone number on this site and never will. You don't have to be a member to read the threads on MR and I don't see why I would want to share that information with the world. I'll put my zip code in the thread and if the person isn't bright enough to use google to find out what neighborhood that is, oh well. I won't usually give up my address/number until the person has agreed to meet, everything up to then is through PM. Maybe it's just my paranoia but I'm always surprised how many people post their numbers everywhere on this site.
On another note, I always get a kick out of people saying "I'll let it go for $XXX", when it's not reasonably priced at all. For all the newbies, a quick search on this site is all it takes to have an idea how much to pay for a certain coral/fish. Don't pay anyone on here store prices unless it's something you really want and haven't been able to find.