Orbital dynamics are fun- a truckload of gravel dumped in front of a satellite either stays in front, or slows down and moves to a different orbit. So you have

Orbital dynamics are fun- a truckload of gravel dumped in front of a satellite either stays in front, or slows down and moves to a different orbit. So you have to dump it in a higher orbit, and let drag bring it where you want it. You could do it, but it would basically look like an attack- the speeds are too high, distances too large, and drag too unpredictable to make it look like an accident.