Why can jump points be mined?
Jump points can, and are mined — you need look no further than the destruction of the Kilrathi fleet at Terra in 2654 or the Kilrathi use of missile buoys. It is not common, though, for two main reasons. Firstly, it is difficult to place a mine in a jump point. While a jump-in point is very exact, a jump-out point is not. Ships materialize around a certain area, but never in one specific place. Second, the tactics of both sides are designed to prevent the use of such weapons. Both the Confederation and the Kilrathi send through spy eye and recon ships before jumping anything of value.
