You think a radar return cannot be used to calculate the speed of a constant-velocity object?
If a judge ordering you to install a speed governor because you keep getting tickets for excessive speeding is a proximate concern, maybe the problem isn’t the radar detector.
This is like, "lock your doors? Nah bro, it's entirely possible to get through any lock, therefore locking is pointless."
Most of these people are just generally reckless, they're not really intent on Going Fast No Matter What.
Sure, people who actually modify their cars to race around will probably go around this kind of safety measure, but even most people speeding aren't that.
That is not a good take if you include the fact that reckless driving in Virginia is already the lowest bar in the United States. 86 MPH is a criminal act. If you are caught doing 86 MPH you are literally put in handcuffs and go to jail.