FB,
Enough already with the doomsday scenario. It is absolute scaremongering, I am amazed you even get out of bed in the morning.
So what you are saying is lets not put in a proven, working system and subsidise GA. Get FAR greater surveillance coverage and safety benefits on the basis of your rantings.
Have a think, the 9/11 guys you reckon wouldn't have been able to find New York if the GPS system was turned off.
Now your talking about them building GPS guided buzz bombs, I don't believe the rockets lobbed into Israel are that hi-tech.
You talk about the "very simple scenarios you offer up", so designing , testing and building GPS guided buzzbombs and keeping it secret can be whipped up in the backyard very simply.
The Russians are putting in to orbit their own satellites for a GPS system. What do the Yanks do then? Take out their system too?
You're talking WW3 now, and this is your reasoning behind hanging on to enroute radars.