I have been watching and taking note. Since the beginning of the month SH has made 192 posts of which just 3 have been on non-political issue threads. To me this shows that he has little or no interest in the club, he is not interested in the greater world outside of his bubble, and only gets his kicks by trying to wind others up. Since I closed two threads down, with the option to re-open them if needed, there were no posts from SH, although he spent hours on the site hoping that something would happen. A bit like a child with his nose pressed against the sweet shop window, but with nothing that will get the owner to hand over some goodies. As soon as this thread was started, which by it's nature was not intended to be political, he was back, and we have seen the reaction.
The past week has been good for me as I have been able to get on without wondering if he is creating bad feeling. It is acknowledged to be a good forum in contrast to some places, because there is a lot of thoughtful comment, which SH does not seem to grasp.
You can put him on ignore if you wish, in which case none of his posts will appear for you, or you can take the advice of our Canary friend and simply not reply. I find it extremely sad that he doesn't ever wish to become part of the community of posters, but happy to create as much disruption as he possibly can.