Proliferation of green and blue DPSS and diode lasers really is scary in protests when you think about it. These chinese green and blue lasers might usually have terrible beam quality, but they're still Class 4 and can cause some serious damage. If you wanna be really insidious, you can take apart a green laser and just use the even more powerful IR part of the laser before frequency doubling to have an invisible blinding beam. Gotta add some optics, though, and better be careful. You can see the beams (or rather, the spots) using a phone cam, they usually have shitty IR filtering.
There's a protocol on blinding laser weapons in the Geneva Convention, but it's mostly about laser weapons specifically designed to cause blindness. Article 2 states that when using other lasers (like targetting lasers), causing injuries must be minimized. Using non-weapons lasers to cause blindness surely falls under that somewhere.
It was made up in 1995, and since then laser technology has made quite a lot of progress. Especially in handheld devices (no, actual laser "rifles" won't be a thing anytime soon, but laser CIWS are in deployment, as far as I know).
/edit:
Btw., due to so many "laserpointers" in the green and blue spectrum now being basically Class 3 and 4 lasers, now pretty much every company here in Germany needs to have a laser safety supervisor appointed as soon as they even have a basic bitch laser pointer.