It's not a good idea to befriend with FB, be it for discussion or otherwise.

Boonex is probably the biggest fear for FB. Imagine 100000 niche sites each with approx. 2000 members or more. Not only are these more likely real members and not multible accounts like they have on FB, but also quality of communities will be higher.

Where can you see FB then?

FB is a data gathering whore for authorities. Only recently they are trying to put more quality into it. Guess why?