I realise that paranoia clouds the reason of many here, but let's be quite clear: klingon-dude was banned because he threatened the site with legal action. At that point, the ban isn't an act of spite, it's plain common sense.
This has nothing to do with klingon-dude's brave stance against reality-based science, and everything to do with him being a bombastic idiot.
EDIT: And hooray for the RPGsite, where I can point and laugh at the bombastic idiot as much as I please: haha, you bombastic idiot, you!!
Ned