One concern I have with those things is people casually using them outside. I mean, I'm not a big fan of heavy regulation in general, and I also think that lasers are cool devices, but even if someone's got eye protection -- which I would be using if messing around with something at that kind of power -- and is not trying to aim at someone, it's damned easy to flash that across someone else's eyes, and that's way outside of the range where your blink reflex is fast enough to avoid permanent eye damage.

I mean, most people won't take a firearm and go blasting the thing randomly in a city or something. They register that they can mess up whoever the thing is being aimed at. But there are people who will be dicking around with seriously souped up lasers without regard for who might be downrange.

https://en.wikipedia.org/wiki/Laser_safety

A Class 2 laser is considered to be safe because the blink reflex (glare aversion response to bright lights) will limit the exposure to no more than 0.25 seconds. It only applies to visible-light lasers (400–700 nm). Class 2 lasers are limited to 1 mW continuous wave, or more if the emission time is less than 0.25 seconds or if the light is not spatially coherent. Intentional suppression of the blink reflex could lead to eye injury. Some laser pointers and measuring instruments are class 2.

Like, that's 1 mW that's listed as the max for safe exposure before the blink reflex is no longer able to protect a human eye against permanent damage. You're talking about a 7,000 mW laser, almost five orders of magnitude up the scale.

And that's not even considering the fact that there are various reflective surfaces that can be hit, can be riccocheting the thing all over.

Like, at that kind of power, if a laser isn't in some kind of confined case or something, that's something where I'd want someone using it a room with eye protection on everyone in the room, only adults present (so some kid doesn't yank off their eye protection or something), an access-restricted door, and a warning sign on that door telling people that high-power lasers may be in use.

Here's a laser engraver that uses less than half of the power of that laser:

https://www.amazon.com/Bisofice-Engraving-Accuracy-Household-Woodwork/dp/B0BVVRFN5L/