Largely because it was redundant. This is all that he really needed to say:
This is my workplace.
That means that the subject is, as they say, closed. As James Lileks once reminded Glenn Reynolds: we are, none of us, public utilities.
PS: Mind you, this is much more an issue for me and my cobloggers on RedState than it is for me here. Most of my banning work here consists of stuff done behind the scenes that nobody ever sees. Plus, I have a heck of a lot less traffic on this site than we do over at RS; and this site is also an anti-burnout mechanism on my part. Still, I completely grok what Ace is talking about; it’s a definite problem.