With the exception of Terrorist IDs, I am completely against the idea of any equipment or ship which is admin-approved-only.
Edit: And with regards to the sensor jammer, if something could be made which, say, halved the range at which your ship could be detected, rather than made it completely invisible to sensors, then that might be balanced. No use in combat, but a big help to smugglers. And if it used up the armor slot, generally only the smugglers would bother with it.
