Some people already elaborated on social proxy. Mirweis and me preferred the social firewall thing. The social proxy is "a visualization widget that provides cues about the presence and activity of participants in an online conversation system". So what? The social firewall is just the digital equivalent of the party pooper thing. It does not exist yet but it might be a visualization widget that provide cues about the presence and activity of party pooper in an online conversation system...

hum I think this is absurd and meaningless