The Barrow-Wight is the super moderator. He has the power to close down topics and kick people off the site. He also gets angry when a thread goes off topic, which I think is the most common offense on the BD. He pretty much makes all the rules, so it's best if you don't offend him.
I made him sound really mean, but no he's nice, don't worry he won't hurt you. For more information on offenses and such go to FAQ at the top of the page.