They have also completed a background screening which showed me their credit score, eviction data and criminal history.

If you are an investor the same rings true have friends come.Maybe if you tell the caller on the phone you will be over with your investor group to let them in that will deter a criminal who the thought of a lot of people showing up will scare them off. 

Basically the opposite of some impoverished scumbag such as myself with ruined credit, regardless of my lack of criminal nature (I was arrested once because I failed to pay a $35 traffic fine a few months prior to that!).

Most are breaking the real estate brokerage laws:http://www.myfloridalicense.com/dbpr/re/documents/re-2200-1.pdfIf unlicensed, these are common criminals and the only way to stop them is by reporting them. 

I require all applicants to submit to a credit/criminal background.

Those won't be easy to remove later, if you decide to install a different type of fence.

Conducting thorough credit checks is an essential part of responsible property management, allowing landlords to mitigate the risk of late payments and financial problems from tenants.Background Checks:Ensuring the safety and security of your property and tenants is of utmost importance, which is why conducting comprehensive criminal background checks is essential.

I know that entering the premises without tenant permission is a constructive eviction and would warrant criminal liability.

They do a great job at providing everything a screen report should give you - criminal, collections, credit score, etc.

And a looser criminal criteria if you choose to (level 1 sex offender or domestic violence, for example).