Seems very much like MAD. I would bet there's a 30% chance that the big players have already picked off some of each other's spy satellites, but they're secret,

Seems very much like MAD. I would bet there's a 30% chance that the big players have already picked off some of each other's spy satellites, but they're secret, can't admit to their existence, much less their method of demise. ASAT missiles are 30 years old now. Surely there are other systems, ground based lasers or something. But the big visible satellites? disabling gps, glonass or any of the communication satellites? That's a real bad idea. Messing with those looks a whole lot like starting world war 3. Presumably, a modern conventional world war scale war would start with cutting the fiber optic cables, and disabling the communication satellites. Step 2, eliminate all of the gps type stuff. Maybe you'd pick off the spy satellites first. Stopping communications and navigation would disrupt economies a whole lot more than tipping your hand about troop locations.