I'm referring in particular to How to determine the delta V required in order for the satellite at pt. A to hit the earth at pt. B?
Those who could give a fairly competent answer to this question could result in the answerer landing in jail, depending on country of origin. I might be able to give a competent answer. I will not do so as I would rather spend my remaining years unencumbered by free but highly substandard government assisted living.
I understand the difficultly of rejecting such questions because many aspects of peaceful space exploration have a dual militaristic use. The technologies needed to enable a spacecraft to dock with the International Space Station are the very same technologies needed to enable a hunter-killer satellite disable an enemy satellite. The technologies needed to enable a dying spacecraft to crash into an empty patch of the Pacific Ocean are the starting point of the technologies needed to enable a missile to hit a specific point on the Earth.
But still, this question, from a newbie, is a bit over the top in asking for the dual militaristic use of what should be peaceful space exploration.