I kind of feel bad for the dude. I mean I think he's a troll, but if he's sincere then he's got issues. It isn't the message, it's the messenger. A ton of people have said he has a point, he just refuses to acknowledge anyone else's arguments even when presented with facts.
I personally believe the discussions on the board will be more productive with him gone, but the amount of posts will drop. That's just because you won't have him posting 8 times in a row saying the same thing 8 different ways and then everyone arguing with him.