It comes and goes - I've learned to ignore it - and the admins have gotten really good about cleaning it up - used to have to tell them. Al Frasca's trapdoor collector board had a similar problem, and they installed a numerical riddle which had to be solved by a poster or the post would be rejected. Kind of a nuisance, but we've gotten used to it, and, it works. My only gripe here is that the "all caps" setting seems a little too sensitive - the whole post, yes, no one likes that, but to all-cap one word for emphasis, and have it rejected, is overkill.