I really like how this feature replaces the users post with "The administrator has decided that USER should be quiet for a while." I only wish that I could allow all of my registered users to see this message. Maybe there is a way to do this with permissions? I looked around, but couldn't find anything that applied to the Coventry option.
I looked around a little more and tried some stuff, and i'm pretty sure this can't happen without a hack. I'd love for someone to prove me wrong though, or code a hack!!