Earlier quoted context omitted.
You are aware that these LRAD systems have been used against US citizens, aren't you?
Police also regularly use tear gas against US citizens. These are weapons that would violate the Geneva convention, but we're okay with them to disperse a crowd.
Isn't that a category ban that came out of a couple specific members of that category that were used and had particularly nasty effects? And then countries' domestic law enforcement rules tend to be defined in different terms.