It'll pretty much only do anything against a camera using a flash in the dark and even then that's probably only marginal. In normal daytime illumination everyone and every thing will still be able to see your plate just fine.

I think I'd rather get a color e-ink display from China and mount it in a fake license plate frame, with a microcontroller behind it displaying a random assortment of plate styles and numbers as you drive along. If you see the 5-0, flip a the switch to lock it to your real plate number until they go away.

You would need a mix of IR absorbing material and IR reflective material like what they use in Zenni ID guard glasses.

An easier way to go about it would just be to install a bright IR light pointed at your plate, it would create a glare that would make it impossible for the camera to read.

I have an IR scope for one of my rifles and thought it would be a bright idea to install a IR flashlight to help boost the field of vision....... The flashlight I got was so bright that it just tuned the whole image white.

So there are things that would work, but it would probably get you in more trouble than anything. It's illegal in every state to attempt to obscure your tags from being tracked in any way.

I’m willing to bet if it did do something useful, you would just make yourself a target for frequent stops by cops.

Yes. You also need a ring of high intensity white LEDs pointed at your plate.

I mean, they make manual pipe cutters. They're not that expensive and operate silently. No reason to activate the shot spotter microphones

"Shoot"!? I'm American too, but not all problems can/should be solved with guns...

Leave it to the fucking pigs to come up with a somewhat reasonable, plausibly deniable way to avoid the law.

The Chinese, I ve heard use a magnetic leaf that can be remotely turned off.

Magic ...

Jokes on them, that's not my car at all

As a person with modest theoretical knowledge and low practical experience in the matter (read: this might be an utterly bullshit idea), I kind of want to make a “Bluetooth shotgun” that responds to any AWK packets with a slew of spoofed info.
If such a thing were possible, I would then make it also listen for responses, and log them with a geolocation. I would then spoof those responses every time an awk was received around that area. (This is because nonsense data can be filtered to reveal just the real responses - my device(s), but inaccurate real data would destroy the value of the surveillance.)

Editing to add - lots of considerations. I wouldn’t want to just attack random people’s home equipment that’s seeking to pair. Maybe it only blasts out a bunch of responses when it’s an undirected advertisement or the advertisement has a MAC that corresponds to spying companies,

This is a shitpost sir.

Anything that can reliably hold a laser on a small camera lens when mounted to a moving vehicle, or even identify cameras in the first place, is Lockheed Martin-level stuff, this is crazy talk. Just mount a Trophy ADS to my Subaru real quick.

They profile more than just the bumper stickers. Faded paint, scratches, dents, one headlight has a foggy casing, tread patterns on tires, whatever they can to illegally track you.