I got a drive-by invite to NN that the dropped me into that chat channel. And man, it was not useful. It really seemed like my fellow sprouts were just... vile... and had no restraint whatsoever. I never asked to be in it, and then I discovered there's no good way to leave it (that I could find, anyway). So I eventually figured out how to mute the channel and the last annoyance to it is it comes up as the default channel to type into until I type "/fc" once. Which is annoying, but livable. The whole "invite" that you have no opportunity to decline is some serious deign fail, IMO.