For years I've thought that conservatives have no imagination, but that's not strictly true. When their paranoia kicks in, they start to make up stuff based on the sketchiest of notions.
Like most pipe dreams, it falls apart when you start asking questions. How exactly do they decide who needs to be re-educated? How do they keep these people quiet after they've "graduated"? How is FEMA related to the topic at all, apart from having some broad but very specifically applicable powers?
On the other hand, there are doomsday scenarios aplenty. The federal government actually built an underground installation to shelter the top brass in case of nuclear attack. If it looks like the Occupy movement is getting some traction, what would dishearten them more than having key people disappear, then come back after drinking the koolaid in these camps?