[lutorm]

Antisat weapons aren't exactly simple, either, though. It's only been successfully done a few times. Intercepting something at orbital velocity isn't trivial (unless you have the capability to actually launch something into a similar orbit and effect a gradual orbital rendezvous.)

[Qem]

I checked, my reasoning doesn't really apply to global positioning satellites, as they have orbits far outside the LEO, about 20000 km. There's not enough mass there yet to ensure a Kessler cascade. They would have to be targeted individually, a far more difficult task.