They use TransUnion as their screening service and I've found all the credit, criminal and eviction reports very helpful to review.

(e) While a person may examine and consider a criminal background check, credit history, or rental history in reviewing an application for rental housing, the person shall review and consider additional history in reviewing an application for rental housing, the person shall review and consider additional information provided by the rental applicant, including, but not limited to, personal references, recency and status of any evictions, and any actions taken by the rental applicant to resolve past evictions, credit challenges, or alleged damages, the recency and severity of any convictions, the violent or sexual nature of any prior convictions, the facts or circumstances surrounding criminal conduct, the age of the applicant at the time of the conduct, the age or vulnerability of the victim of the conduct, evidence that the applicant has maintained a good tenant history in the intervening time, and evidence of rehabilitation efforts, consistent with state and federal law, including, but not limited to, fair housing laws.

You'll regret it.A tenant must be a law abiding citizen (no criminal background), willing (credit verification) and able (job income verification only w/ no commission or tip payments included) to pay rent and take care of a home (landlord references)   If they pass all these, then whether they are "nice" or not comes into play.  

I don't think we should ban all wholesalers just because some are scammers, criminals, and idiots. market will weed out idiots, and criminals who break the law should be prosecuted by gov.

It's difficult - often impossible - to verify their identity, address history, ability to pay debts, or criminal history without a social security number.

Stats.Most good rental agreements contain some language along the lines of "Tenant shall not engage in or allow others to engage in any criminal activity on the property."

Yes, Ive seen the over sensitive investors who dont receive a touchy feely response or something they dont wish to hear, so they throw a cyber meltdown while leaving.

If they don't, you can start the eviction process to get them out for criminal behavior and lease violations.

I called the police and they say the theft is only civil and I have to go small claims, and the threats aren't criminal because its not physical violence. 

I've used both Avail and Keycheck for background check (credit check, criminal record and eviction history) but am currently using Turbo Tenant because they partner with the banking/bookkeeping platform I use, Baselane, and I like to keep it all in one place.