Sorry to disturb you if you don’t want to be @ed.

If their rudeness etc causes me to not be able to do my job (they yell at refuse to let me in when I've posted notice), then that's a violation for interfering with management duties, on top of the violations for disturbing their neighbors, housekeeping violations, failures to report maintenance, etc..

It's disturbing to see they are still posting content on their YouTube page and unsuspecting people are still gobbling it right up! 

Some people are more disturbed by that than others (even if they have nothing to hide) - and following you around may give them a greater sense of control and therefore comfort.

Sadly, both of them escalated this conflict and started creating domestic disturbances so we had to move both of them out.Assuming the upstairs family is being reasonable, I suspect no matter what you do, the people downstairs will never be happy.  

This is a huge disturbance to my other tenants.

My #1 fear going into this was partying guests disturbing neighbors and damaging the property.

You may find this a viable option with rates where they are, especially if your rental income continues to cover the mortgage.Home Equity Line of Credit (HELOC): If your property qualifies, you could use a HELOC to access the equity without disturbing the current mortgage.

We also had guests get drunk and damage property and equipment, including punching holes in the walls and throwing loud parties that disturbed our neighbors.

In the eyes of the law, it's no different than a cane or a wheelchair.Keep in mind, just because the ESA is not considered a pet doesn't mean it gets to run rampant, disturb the neighbors, crap all over the parking lot, or tear up the house.