And a few years later the FBI will be using the tech to shoot people's wives after tricking them into violating some technicality of firearms law (just one example of abuse, plenty of others exist).

Then a decade or two later every patrol car will have the tech.

Trickle down effect is very real for law enforcement.

It's still difficult to identify persons with this technology. So, only valuable if you don't care about collateral damage.

That’s placing a lot of faith in the “we don’t do body counts” crowd. I don’t believe it’s been earned.

It might work in a hostage situation where they detect many people crouched / staying still, and one individual pacing around.

It will work even better in "silence dissident" situation. Collateral damage is just a bonus, you want other people to fear being associated with your target.

It feels very close to the weapon in the Schwarzenegger film Eraser.

Thermal scope on a 50 BMG does this already.

If you know what you want to kill is inside you can just point an AT4 at the building and press the bang switch. I guess .50bmg is a lot cheaper to use at scale though.

Where do you live that walls are transparent to infrared radiation?