I OC on a ZRX1200R, but use an active retention holster. Never got a ticket on that, but a few in a semi, how wrong is that?
Response seems overkill, but you didn't mention how much overspeed you were. 100 mph over? I could see some extra precautions maybe. He thinks you might pull your knife on him?
Yes, I believe they can take possession of your weapon, which you get back as long as there are no other issues with you, other than the driving infraction.