Um, what's a "dork disc"?
The circle of plastic or metal that sits between the largest gear in your rear sproket and the spokes. The purpose, I believe, is to prevent the chain from dropping into the spokes if you overshift.

I have yet to remove my dork disc. Maybe if I get a Seven, I'd feel different, but mine doesn't make any noise. There was a previous thread that talked about cutting it off. I'm so mechanically dis-inclined I'd probably succeed in cutting a spoke.