1. The same way they tax cars, require them to be registered with a yearly registration fee.
2. Don't let anything fly anywhere, set up traffic corridors that are not near trees, power lines, and give enough space for a drone to correct itself after it gets hit by a strong wind gust.
3. Again the same way you do it with cars. You make rules and laws and if people break them there is a penalty.
4. The similar people who don't care if they live near a busy noisy street. And these will be electric, the nosiest part of any moving device is the engine, being electric instead of gas, there will be minimal noise. For one crashing in to your house, yes it could happen, but the safety level would need to get pretty high if people started to use these for widespread use. No one would ship with them if there was a 1 in 10 chance you would loose what you where delivering. For the ones that do crash the government can require liability insurance to be on them, just like cars.