Speaking again as devils advocate this entire topic falls outside the purview of the
Group Policy. I mean I am not one to say hate speech is tolerable, but it seems we are all getting a little over sensitive at the moment. I have been in TS with Mobius and Steo two of our senior members when the black and white lines have muddied into grey mush because of "colorful" jokes.
I would say that if anything a temporary ban from TS or the boards may be necessary if the topics were truly out of hand, but even then I would say that you would need some people to back up your story. Other than that I don't feel any action should be taken in regards to them being kicked out of the Mobius group because this is after all just a place for PVE and I at least was never informed of it being anything else.
I was always told that this was community and group play optional. "Don't spoil another players game!" was the original slogan I was brought into the fold toting. Teamspeak is not a right it is a privilege and those who own the server though it wise to have "colorful" channels as I described in my previews post. I guess what I am saying is that if you find the pond you are in too murky or dingy maybe it is your responsibility to see yourself out and not ruin the larger groups good time. If there are six or seven guys in "The Grotto" spewing hate speech and you start telling them what they are doing wrong then you are probably going to get an ear full. In that case you are also the one in the wrong.
TL;DR- Read the group policy, try to understand the essence of "Don't spoil another players game!", and if you see a group of guys playing with fire and you don't want to get burned then don't play with them.