If there was a way perhaps to restrain the protester(s) in such a way that they can remain upright, present and vocal; but immobile, I’m confident that it would be so effective that law enforcement would be criticized for using anything but these apparatuses. Cost would not be a deterrent in this case.
How are you expecting this to be used for crowd control without the risk of a person falling down without being able to arrest their fall?
google "chinese man catcher"
ICE isn’t killing protesters because they don’t have any other option, they’re doing it because they want to. I don’t think this would solve any problems.
I read comments like this and am always amazed at people's understanding of how protest works. I don't advocate for violence and destruction, but protest absolutely works because it makes things inconvenient for the people they are protesting.
When people complain about protesters getting in the way and being noisy and generally being inconvenient, they are bemoaning effective protest. That's a constitutional right.