Ooh, outfitting a drone with that stuff might be a really interesting way to disable those things, if someone were to do such a thing. But I would imagine that doing so might lead to that kind of foam being heavily restricted. It might be beneficial for people to study the benefits of using multiple substances for that purpose, like spraypaint, that foam, and other materials which would be easy to use. I wonder if water balloons/sandwich bags filled with that stuff might be similarly useful.

Just for scientific consideration, of course. Again, I'm not advocating that people try all of these various things in order to determine which are the most effective at destroying these privacy invasion tools which should not themselves exist and which should be felonies to own or operate.