HOW TO GAME THE SYSTEM?

I didn’t spend much time trying to absorb the details of this story so I can’t say for sure, but it sounds to me like people in Philadelphia have figured out how to game the system by which property owners receive notice of delinquent property tax foreclosures.  
It also sounds like the scammers are selling the properties to which they have fraudulently obtained title to innocent buyers who are not getting title insurance.  Don’t do that.  I mean, don’t buy property without title insurance.  That should be the simple way for buyers to avoid being victims of this scam.  I’m not sure there’s an easy fix for the owner who lost the property in the property tax foreclosure, however.