There’s a crowd-sourced effort to catalogue these cameras on OSM.
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I’d say spray can on a stick. Maybe even water soluble colors so it’s not a complete loss if you get dragged to court.
This is a nice print, you’d need to loop around a string to trigger it but I’d say it works. https://www.printables.com/model/315470-spray-can-handle-print-in-place
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Paintball gun?
I think it is smart not to carry around something that looks like a weapon and might be construed as such in a court of law when doing something semi illegal. Especially in the us.
paint balls and a sling shot?
Something like this, with some modifications might work. https://www.amazon.com/Aerosol-Dispenser-Testing-Smoke-Detectors/dp/B008UPXA9A
Get an old fire extinguisher, fill it with black paint, and pressurize
You can find a map of cameras on OSM. And if you don’t want to take the risk of doing the destruction, you can help others by just mapping the cameras.
Bicycles.
