I lived in New Port Richey, Florida most of my life and they have a fleet of "Mosquito Patrol" trucks that go up and down residential streets every night spraying stuff into the air. After they pass by, you cannot go outside and breath the air for 30 minutes or so because it feels like crud collecting in your throat and burns your sinuses.

Incidently, I met one of the guys who used to drive one of the trucks and his friend who also drove one was standing on top of a truck one night, checking the valves or something and sprayed some of the chemical into his face by accident. This guy spent the next 3 days in a hospital bed while his organs deteoriated and he bled to death from the inside out. My friend promptly quit.

There were some people in the Moon Lake area that would shoot at the truck when it came by and so they stopped spraying there.