According to I've been reading Diaspora unfortunately does not have the Communities feature. Also there is less people than identi.ca . But it has also become clear that Diaspora (and I don't think anyone can deny that Diaspora shares the same philosophy as GNU) uses efficiently social networks: https://twitter.com/joindiaspora/ . Here Diaspora project's director saying go away noob!: https://twitter.com/spectrumgomas/status/281348200932184064 (this does not occur with Communities feature).
Diaspora uses Ruby, why? Because teenagers knows it. Why? Yukihiro Matsumoto has used very well social networks: https://twitter.com/yukihiro_matz https://twitter.com/matz_translated . And Who won the FSF Award recently? GNU Guile? http://www.fsf.org/news/2011-free-software-awards-announced . In the end the results are what count. In my opinion I think it is very wrong the video that mentioned . Real life doesn't work this way. Right now I'm going to keep google+ account. When Diaspora or other social network works well I'll change there. I'll post showing this thread in which I think it is clear that you are right morally, but for practical reasons account keeps. Also I will say always in Google+ that for good, official and reliable GNU Guile answers the right place are these forums.