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Aren't "millimetre wave weapons" used for crowd control by some US police departments?. I recall seeing some 60 minutes style video about it a while back. It makes you skin feel like it's on fire.
From https://www.eetimes.com/millimeter-wave-energy-to-be-used-in... (June 2001):

“It works by heating the water molecules in the top 1/64-of-an-inch layer of the skin,” said Marine Corps spokesman Maj. David Andersen.

According to reports, a 2-second burst from the system can heat the skin to a temperature of 130° F. Elsewhere, the AFRL describes the sensation as similar to touching an ordinary light bulb that has been left on for a while. “Unlike a light bulb, however,” says the AFRL fact sheet, “active-denial technology will not cause rapid burning, because of the shallow penetration of the beam and the low levels of energy used.”

Edit (me, not the article): I'm not saying that this information is necessarily true, this is just some info I found that was at the top of the search results, from 22 years ago, that I put no effort into fact-checking with other sources. And I wouldn't be surprised if they're used for crowd control, but I don't know. But the second half of the parent comment seems to be accurate.

What about the eyes? Does it blind you if it burns the top upper 1/64th of your eye tissue?
Also sounds fairly problematic if they sweep the beam back and forth across people a bunch of times.

After all the skin layers are gone, it's not like the beam will stop working... :/

> Aren't "millimetre wave weapons" used for crowd control by some US police departments?

The capital military police and the border patrol have both inquired about using these millimeter wave weapons. Both were rejected [1]. The weapons were considered but also rejected for use in Iraq and Afghanistan [2].

In 2010, a prison made news by installing such a weapon, a move opposed by the ACLU [3]. It is unclear if it was ever used.

[1] https://www.npr.org/2020/09/16/913748800/military-police-lea...

[2] https://news.yahoo.com/the-secret-troubled-history-of-the-mi...

[3] https://www.aclu.org/news/national-security/dont-let-militar...

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But maybe we shouldn't enabled people that want to torture others by building them new and better torture implement.
You got a licence for those pliers?
There's a difference between a tool you used to torture someone and a tool someone made to torture someone "better"
Misleading title 100%
> “There’s a big responsibility on manufacturers to stop trying to find the most extreme forms of pain on individuals (…)”

> Edwards said some of these items are being developed by companies looking “to make their mark in the industry”.