Hypothetically speaking, is it ever okay to tell the officer you were jamming?
Say you're in a state where there are no jamming laws. Also, let's say you turned the jammer off quickly after slowing to the PSL - but the LEO had a Laser Atlanta or knew "the signs". He pulls you over and asks if you have a laser jammer - then what?
You could lie. You could play dumb. This would be an epic failure though if he knew what to look for and spotted the heads on your car. Then you're in deep s*** for lying to an officer.
You'll tell him it's a parking aid? Seriously, we all know that's a load. I doubt that is going to fool anyone with an IQ above room temperature. If anything, I would think that makes you look worse because you're admitting you know what those strange bubbles on the front of your car do.
Could you just tell the truth? Respectfully, of course. Without proof, he can't cite you for speeding. Could you be charged with interference? You did turn it off afterall, so he got a reading. Also, assuming all of your paperwork is in order, tint is legal, and all that, can they really do anything if you tell the truth? Seems like a stalemate to me.