When it comes to peace and quiet it isn't going to happen with other people around.
There are empty anchorages out there away from people. Sure they are not next door but they are the only ones I feel a person should expect quiet. Then you may find that nature will be too noisy (damn critters).
If there are other boats, other people, there will be noise. Many anchorages will have lots of noise including traffic noise from land, so I say generate at will. Though it would be nice to sleep after dark I will not be asking you to shut it off unless it is really noisy or stinky. Stinky is never good as that can be a health issue.
Have faith that the oceans are going to rise and flood the world, that plague and pestilence brought on by Climate Change is going to punish us for not believing. Please do as they say it is our only hope. :P