The main reason to establish where the user is posting from is exactly
the opposite of what you may think. It is do so that people cannot
fraudulent pretend to be in one place when really they are in another
especially sellers in the Collectors market.
My hope is that no one that is so close to you as to know your home that
they would choose such a method to see when you are not home. Most
people are away most of the day so they would be vulnerable just by
going to work.
We live in an imperfect world and the fraudsters are everywhere and
there is nothing one can do to stop them. This is just one little
barrier which means they need to take extra steps if they what to hide their location and fraud
people so maybe they will go somewhere else that is not verifying where
they are posting from.
From my own experience also the community members
always signal if they smell a rat and that is always very good.
Best
Bill