> Unfortunately it is also exceedingly likely that the folks who shoot at road signs as their particular outrage against government are most likely to think that surveillance drones are there to spy on them, and not inspect infrastructure.

I think you're conflating issues. At least where I grew up, people didn't shoot road signs out of anger at the government. They did it out of boredom. Sometimes as a competition with friends, sometimes alone. I never partook myself.