It turns out that radar guns are pretty accurate and don't really lose much calibration over time. They simply don't see widespread problems with misbehaving r

It turns out that radar guns are pretty accurate and don't really lose much calibration over time. They simply don't see widespread problems with misbehaving radar guns. So when the court hears someone complaining about calibration or whatever, >99% of the time it's just trying to weasel out of a ticket on some technicality, and the person was legitimately speeding. The court would have to be stupid to fall for this ploy. Remember, the standard for traffic court violations is not "beyond a reasonable doubt", it's simple preponderance of evidence.