Compared to other blogging/networking sites (LiveJournal, Xanga, TagWorld, Multiply, and of course, Friendster & MySpace, to name a few), Yahoo! 360° is about the most anti-social "social network" I've come across.
Just like on the other networks, I often browse to see if I happen upon anyone who seems interesting in one way or the other.
8 times out of 10, when I add such a person, they either accept immediately or do so after approving my request.
The exception to this is Yahoo! 360°! 9 times out of 10, when I attempt to add someone, I get an immediate response of:
"Would you like to add <insert choosy user name here> to your Favorites?
By adding <insert choosy user name here> to your Favorites, you
can view the latest public content from <insert choosy user name
here>. <insert choosy user name here> will not be notified.
Note: At this time you cannot invite the person as a friend."
WTF is up with people there?
The site has an unbeatable structure with the tie-ins to the rest of Yahoo!, and yet no one takes much advantage of it.