F.E.M.A. Camps for conspiracy theorist

F.E.M.A. says they exists in the event of a major disaster like Katrina. Conspiracy Theorist say.....
1) Why weren't any used during Katrina?
2) Why are they in remote locations and guarded by the military?
3) Why are they surrounded by barbed wire?
Conspiracy Theorist, also referred to as Tin Foil Hats, believe these are secret government internment camps in the event of mass civil disorder.