plaintiger: I can see the use of it, but I think it'd be a shame if a lot of people used a "whitelist" facility. It prevents good natured messages that come out of the blue. A "good post" message or "I saw your profile that it says..", etc, even "Interesting. A statement like that raises.." I do quite a lot of that sort of messaging; it can makefriends out of strangers.

I don't know about the automatic bit. I've got "enemies" on my "Friends" list I think of it more as a Watch List