For example, if your renters are making noise that any neighbor considers to be a "disturbance" (literally that's the word they use in the bill), the police will be called and if there are 3 verified disturbances, you will loose your ability to rent the STR for 2 years. 

@Anirudh Reddy you should NOT depend onthe cops to remove homeless people and squatters unless you verify the local laws and what the police will actually do.HOW are they getting access to the building?

The police sorted everything out.

If city revenues fall, their only option is to cut back on services, which includes police and schools.

I spoke with the police and they told me that they could not remove the unwanted guest because he had been living there for more than 30 days and set up his mailing address there and therefore he could only be removed through an eviction process.

They do not want to deal with the police!

@Andrea FinkelsteinI would call the police and a tow truck company everyday until the problem is fixed, if people are trespassing and littering that needs to be stopped.

Call the police!"

They would need to deal with each other as neighbors or call the police if a local noise ordinance was being violated.

Buildings like that can be stabilized with careful screening, access control and surveillance systems and coordination with community policing.