[citation][nom]nuvon[/nom]What is so exciting about shutting down a satillite by sending some commands through computer? If they were to do it the Chinese way: shoot a missile at it. Then it is exciting![/citation]
Because the satalite is traveling over 7000 m/s in an atypical orbit, and it takes some pretty sharp calculations to plan the de-orbit burn that will drop it safely into a low-traffic part of the ocean, rather than slamming into a possibly populated part of the landscape at 1500+ miles per hour.
Incidently, shooting anything in orbit with a missile is an incredibly stupid thing to do. The cloud of debris created from doing this will largely remain in orbit, and every fragment large than 1 cm will present a navigation hazard to every other satalite or vehicle that crosses that orbit. In face, space debris is a growing problem as decades of accumulated defunct satalites, lost/discarded parts, debris from collisions, etc. has filled near-Earth orbits with over 600,000 bits larger than 1 cm; yet we are only tracking the largest 20,000 or so. Now granted, orbital space is vast, and the probability of a catastrophic encounter with an uncharted bit of space debris is pretty small; but we more certainly do not want to be adding to the problem by blowing things up in order.