I've noticed that I can post just about any opinion I want, anywhere I want, if I do it civilly. The various folks who get banned from boards generally have a hard time with the concept of civility.
They also seem to have a hard understanding that this isn't a 'public' forum. This is Bob's private property, and we post here with his permission, which he can revoke for whatever reasons he might or might not have. I haven't noticed that hampering my ability to voice my opinion. It does seem to hamper a few people whose opinion seems to be that anyone who disagrees with them is a pinheaded jerk. So be it.