Or they'll have the drone just spray the entire area (crop-duster style as another poster put it). Target gets hit. Collateral damage? Oh well. So you send fifty people to the hospital. It's not like you killed anyone.
Bonus feature: If there's a protest you don't like going on - even a peaceful one, you can get a lot of the protesters in one sweep without putting yourself anywhere near them. After all, you just know that those protesters were turning violent right at that moment and can file that in your report.