Really cool idea that I'd be reluctant to enable for any of my sites because I assume that it would just be used for people to be awful.
Maybe I'm just still traumatized by Playstation Home? A group of my friends all got Playstation 3s together, and we all decided to try Playstation Home, a town square for people to meet. The group met up and then spent the next few minutes being accosted by one a-hole after another.
Or maybe it's the github issue I had to delete today because of someone being a big, giant jerk.
TBF: I went to this town square and people were civilized, so maybe there is some hope for humanity. ;-)