Thieves have stolen things from me and when I went to message them all evidence if them is erased from my records, Their names, phone numbers, everything in my personal correspondence is eradicated upon THEIR BLOCKING ME! You protect thieves, liars and flakes by doing this. There are also people who het off on luring you to drive a great distance who disappear from the app when you are on their street or nearby, often I don’t even think they are where they were claiming to be. Another scam is having you stop to buy them some kind of game or gift card and they want you to take a pic to verify you got it, you do and they block you and you lise all evidence that you’ve been swindled.