I am, and have been, very interested in countermeasures that obscure plates to non-humans. Bright IR to severely overexpose, shuttered lenses or pulsed LEDs that create severe beat-frequency disruption of the image, some magical thing that causes the characteristics of a plate (retro-reflectivity is a key signature, I think) to not look like a plate to an ALRP so that it won't even think to try and capture, etc.

—I mention retro-reflectivity only because within the last few years Washington state has required that license plates be replaced every three years rather than just getting new tabs as it had been forever. I asked a DMV engineer why this policy was put into place and he replied that it was due to decreasing reflectivity over time. Perhaps coincidental but the policy was instituted right about te same time ALRPs started to be used by parking enforcement and police.