I'm not sure if by sending out notices it could be viewed as some sort of attempt to unfairly retaliate/humiliate/discriminate against the owner of the service animal and do you more harm than good. 

I've also heard of some bold landlords going to their work place to confirm with their boss that they really work there.Before that even, I can get a sense by looking at the car they pull up in for the showing appointment ...

Its what tanked our housing and banks a bit back and harmed all.

However as we know this I much more difficult than it appears.. and in some states they are starting to crack down on this.. unleashing Non educated folks into peoples financial lives is never a good thing.. folks get on here and are encourage to start anywhere with no thought as to the potential harm they can do a seller and or buyer.. 

No harm in doing the work yourself but it you want to grow you will have to hire other people and manage them.

If you are just a troll I think your post can harm some newbie investors.  

Personal references are the best way to nip the scamsters in the bud while not harming folks trying to do a good job but having a bad day or two.

From 1 TIM 6:9-10:Those who want to get rich fall into temptation and a trap and into many foolish and harmful desires that plunge people into ruin and destruction.

As long as you are not betting on property appreciation and more for cash flow, and you have done a full due diligence on the real estate asset, I think there is no harm in expanding your portfolio of investments to real estate. 

I don't know Nebraska law, but I think it's a fairly universal concept that whoever provided the alcohol is next in line of liability after the person who imbibed and later caused harm to someone or something.