A little overpowered perhaps, but something like this would be cool. Stealth Bomber deployment method, and one of two types. The first makes it impossible to get a stable reading off the wormhole and makes it inherently unstable; the second causes the wormhole to reduce mass drastically, potentially collapsing it. Given a combination of both, or 2-3 of the second, even a C6 Wormhole with maximum mass could be brought down in theory. Works for both attackers and defenders.

edit: I might add, that it's almost guaranteed that the people who live there, will use this tool much more effectively than those who wish to play games with them.

Here's a proper idea.

Repulsion Modules: These modules would create a directed burst of a repulsion wave that would effectively bumb a ship 10 to 20km away. No more station docking games!

EDIT: to make it fairer, it could only work on ships that are still or barely moving.

Deployable decloaking field

[Consumable, terrain transforming]

This anchorable module pulses an area effect decloaking aura that will uncloak all ships within a certain radius as if they had moved within 2km of an object in space. Once anchored it cannot be unanchored and will decay, falling to pieces and destroying itself after a certain time period.

Small 15 km radius
Medium 25 km radius
Large 40 km radius

Tech 1: 15 minutes
Tech 2: 25 minutes

Gossip in seedy cantinas has it that certain pirate factions have developed more potent versions of these devices.