Paintballs are even better, environmentally and effort-wise.

Especially if the propellant tank is pressurized using a solar powered compressor.

(Theoretically, of course. I wouldn’t advocate destroying private property.)

Destroying public property is bad in a general sense, but not enough to describe the situation here.

Would you take the knife out of your robber? Or is that stealing private property?

Surveillance endangers society/democracy and it's a threat too