I did a little experiment and yielded , what to me was expected, results within seconds. I pretended I was at a Starbucks and I heard them call out my grandmoth

I did a little experiment and yielded , what to me was expected, results within seconds. I pretended I was at a Starbucks and I heard them call out my grandmother's first name for her coffee order. I googled her first name and the name of the town the Starbucks is in--no state or other info--just two words. I scroll down, swipe through a few pictures, and now I have her life story in front of me. From that I can go down the rabbit hole and easily construct a phishing profile that I can use on her family members. I just assumed everyone already knew you could do this.