I just don't want to disturb my tenants if there's something walking around taking pics.  

You want smallish, well soundproofed rooms so your tenants aren't disturbed by others. 

Another problem with people living closer together is noise disturbance. 

Originally posted by Mike Cartmell: Preliminary/Final Drainage Report, Erosion Control & Grading Plan, Water Report, Traffic Study and an Erosion Control Permit will be required if the area of disturbance is greater than 1 acre, which @J Scott mentioned.In Maryland, it's not even 1 acre...it's 5000 square feet!

Playing music late at night to disturb is against the law.

Cannot disturb others with barking (unless alerting for a medical issue) or aggressive behavior.

And @Omar Khan you make me think the same thing which is fairly disturbing to me because I've heard your name mentioned as a 'financial expert'  around multi-family properties.Are you saying that it's in anyway ok to be dishonest or mis-leading or immoral just because the banks are?

Called the landlord reference (provided by the tenant) and the landlord stated that they were currently being evicted, late on rent for the last few months, and have caused disturbances within the complex.  

I am not sure on how your lease is set up, but on ours we can issue a warning to the tenant saying that they are disturbing the other tenants. 3 warnings results in a 30 day noticeIf the person being threatened would file a police report, you could give one warning and follow up with 30 day notice on the second notice.

The repeated calls for domestic disturbances and the trip to the ER should help her get the restraining order quickly.