Spoof the interface to make the attackers believe they are attacking a foreign industrial plant.
In reality, they are attacking the utility plant located down street based on WiFi location.
The main purpose of the honeypot system is to obfuscate the true location of the target (the attackers own infrastructure).
Then watch hilarity ensue.
Defense systems would be great. You could get countries to nuke themselves using their own cyber ops team.

"The Grid.
A digital frontier.
I tried to picture clusters of information as they moved through the computer.
What did they look like?
Ships, motorcycles? Were the circuits like freeways?
I kept dreaming of a world I thought I'd never see.
And then, one day...
I got in."
- Kevin Flynn

Or my car could sense tire traction, temperature and a few other sensor conditions to tell me this on the
big display. Oh wait, it does that now!

(Right, Upper hand corner of this page for me.)
"Wondering what your patents might be worth in the current market?"
Wow! I can't resist selling my patents!
Ahem! Well, back to /.
'Those lousy trolls, I wish they would just go away.'

Which according to your comment would mean that the light difference is only 20dB down in power from the starlight.
Additionally, the planet's light spectra would be different than the light spectra of the star.
Combine these two facts and I believe his question still stands even if he doesn't "know science".
Would the sensor be able to detect the difference?
If background noise at the telescope is at -120dBm (or less with cooling), then is it possible to detect a difference at a specific frequency?