It seems like most of the scammers that want a no-fee pet won't even spend the money for the vet and dog license-- they'll just move on to ask an easier landlord target.If you know the rules, you may on occasion need to accommodate an ESA but you'll probably weed out the VAST majority of the scammers.

Even great ones may seem to appear on occasion that you should still take the time to review their work on the first few jobs. 

I wouldn't say it's always a red flag, but it can be on occasions.

I buy and hold SFR with my business partner and on the occasion we sell a deal here and there.

I had two occasions where the tenants looked amazing on paper, and connected with them really well during showing but turned out to be super incompetent tenant and called me about everything inconvenient about the house (i.e. smoke detector out of battery, spots with wall paint, natural porous holes on a travertine floor tile).  

There is a term you hear on occasion in law enforcement circles - SBC - Suicide By Cop!

Also, on those rare occasions I do have to evict someone, Section 8 would not cover damages or late fees, and the cost of going to court plus cleaning plus lost rent more than consumes the deposit. 

On many occasions we have had to point out something that needed adjusted on the Hud with title companies.

And it's been the case, I have told him in multiple occasions, the floor is in good condition, even the kitchen cabinet is good, why is he trying to replace all these items and increase the work?

Unfortunately, our condo association manager has on more than one occasion had fresh kills on top of cars or on trailers.