I know that the members that are very active on here. Usually know who to contact with in an area when someone posts a 911 repair posting. Especially if someone is brokedown on the side of the road.
Heck back when the chatroom was used daily by 12 or more members. You don't even want to know how many recoveries were done through there. Someone would post up a 911 repair posting. The next thing you know the chatroom turned into a dispatched center. With members stating they contacted this person or that person. Before we knew it a member was there lending a helping hand.
I know I was involved with a few of those. But like I said usually when someone posts up they need help and are broke somewhere. Pm's from other members go to the members in that area.
As for an automatic system, I think what would happen is a lot of pm's going out with very little response because pm's are only good when members are online to respond to them.
There was talk at one time about a phone book being made up. Now what ever happened to that I do not know. But back then there were only about 15,000 members.