Cheers, thanks for the explanation. My three concerns are:
1) what led this guy, who seemed to me like a pretty thoughtful poster, to decide to post that all of a sudden? on this question I still don't know the answer, and the fact that he's banned permanently means we won't know if there was some other explanation other than that he just went off the handle.
2) should a pm ever be grounds for a permanent ban? b/c if so, then one would think that it should be all pm's, not just those sent to mods. if he had sent that pm to me, for instance, would he be banned? if not then we are in a somewhat awkward situation where you can get banned not for what you write, but who you write it to.
3) the racial undertones in many of the posts on this site continue to surprise me. maybe it's just a reflection of discourse on the right more generally, but I am shocked at how often it emerges and goes unchecked or unnoticed. I know it's difficult to moderate explicit versus subtle racism, so perhaps there's not much that can be done. But I wonder about the fact that someone is still an active member of this site after posting a thread which had the title "if Obama had a son...," and which linked to a story about 3 black kids who killed a white guy. that seems about as explicit as one could get.
anyway, it's not a general complaint about how this thread is moderated. just some discomfort about how this went down.