He must have angered the BP police.

I prefer to let her polish her toenails 24/7 if that is what she wants to do because I don't want to be her boss.

Well - Zoning is another example of government police power, so there is an intrinsic consistency.To me, the more relevant question is how far government police power should extend?

Will they cause trouble for me, the neighbors, the police?

The city has also started publishing regular reports on the changes in crime by police district that you can find on the city's website here.Also the new mayor and police chief have done a fantastic job on starting to turn things around.

This is one time free pass,next time police handle. 

Napa Valley is VERY hostile in policing non-permitted short term rentals.

As I am currently rehabbing one of my units, I have the possibility to rent to a Police Officer with K9. 

If I were in CO it would be a very different story as I understand they are much more tenant friendly.Contact your the city police and ask if there is a landlord training program.

We can analyze people movement and report incidents like this in real time.4) Alert immediately if a police car shows up, hear police sirens in the property or hear gunshots.5) (Controversial but likely legal): Monitor how many unique people are entering/leaving each door daily (from cameras in parking lots or corridors) and log that information.