If the game can warn you that you risk incarceration for jumping into a safe system without your transponder...
If the game can warn you that you risk battle for jumping into a system that has a hostile near the jump point...
Then it can definitely warn you that you risk incineration for jumping into a pulsar system!
Alternately, the pulsar could be animated on the hyperspace screen. (turning little twin emission streams. like a lighthouse in the void.)
or just leave a danger level:high buoy in the system itself. (just how did all the redacted systems get theirs anyway, without fail? They wouldn't have done it themselves, would they?