I just mean that in the way that this site is a town square, or all of the rfc's, in that anyone can (for free) see all of the discussions and participate. Just like a town square, not every comment has to be addressed or promoted equally, but I don't know of a better way to release information and allow for anyone to discuss it with others.

I'm not really sure I see your point, then. An organisation like the FSF is going to be pretty resource-strapped, so it makes sense that they're selective about where to maintain a public presence. Why should they stay on Twitter when it's highly dubious that they're getting any value from it or vice versa?