I decided to wait a few days before commenting, in order to reflect, and to attempt to minimize the impact of my own clear bias in favor of continuing to allow discussion of other conspiracy theories on my response.
I can certainly understand where Phil and Fraser are coming from, and I admit that the September 11 conspiracists are well past the point of sounding like flock of parrots--all we get are the same tired arguments. I also agree that something had to be done.
Having said that, I have to second (third?) PhantomWolf and Laguna2 and say that I wish we could at least try strictly enforcing the rule on backing up conspiracist claims (which I've advocated for a long time) and see if that improves the situation. I'd also like to revive a suggestion I made a while ago, which is to have a FAQ on the various major conspiracy theories, so that some broken-record discussions might be ended with "read the September 11 FAQ, Section 2.21," or some such reference.
Finally, like some others, I don't feel that I have nearly as much to contribute on space subjects as I do on other CTs. However, I participated here back when the moon hoax and Planet X were the only conspiracies discussed, and I will continue to participate even if those are the only ones allowed. My participation will likely be limited, however.