I agree with @lnxw48 - I accept and (somewhat) encourage that the @fsf crosspost to #Twitter. As long as they're doing it _from_ a free and open platform.
Had it been the other way around though, as with many back in the #identica days - then all of us would be depending on Twitter not fucking up their policies even more. Today, it's the Twitter users who are at risk of losing the communication :)