Tue, 02/19/2008 - 10:53
Indeed.
This is just part of a larger post I'm working on at the moment about choosing where to host discussions...
The broadcast feature of Facebook is both an asset and as you identify a potential privacy issue.
I'm not sure why it should inhibit discussion though - as when I'm in an open discussion forum elsewhere on the web my friends could easily see what I'm saying - all Facebook does is let them know which discussions (via groups) I might be joining in...

