A rather interesting suggestion. Instead of Jump inhibitors that just lock sectors down preventing ships from leaving the OP suggests the opposite effect. A station/planet only system that stops ships from jumping near it.
Concept: An anti jump drive system that locks ships out of certain sectors. Placeable only on stations and planets. Range 2-3 sectors in all directions. Heavy energy/maintenance costs. potential limit per system.
Debatable details (things to discuss later if confirmed): Operation method, Range of effectiveness, counter measures.