I posted this last night with the wrong link. Here's the right one.
I think @dulcima mentioned this happened at one or another protest. At the time it was reported as a sonic weapon, but those don't make people's face burn.
Anyhow, long story short, some auminium wire mesh or aluminium foil can be used as a shield. If you bring a poster to the protest put aluminium in the middle. If it's made of corriboard it should also help against auditory weapons and water cannons.
masuji 0 points 3.2 years ago
"I think he was concerned about the legal implications of discussing it."
Don't care. They use a weapon on a peaceful crowd, indiscriminately, they instantly become lawful enemy combatants.
They set the standard, they get held to the same standard.
Anyone used a weapon against them, how would they respond?
Exactly.