Or another strategy I follow is to let their posts

Or another strategy I follow is to let their posts remain in view so I can watch the frequency of them and try to get a measure of the tone and figure out the underlying strategy of why they post the crap they do. In the most recent case of our annoying poster, it is pretty straight forward to me: this is a past alias that has been either banned or run off from our board for FUD and they are back now to pester, annoy, and clutter up the board with useless drivel. Almost like a child who's feelings got hurt trying to seek some very petty revenge.