Here's another, this time with LinkedIn.

I took an ambulance ride. The attendant in the back talked with me during the ride to monitor whether I was remaining lucid. Did not know him, never met him before, never saw him since.

A week later, I was scrolling through LinkedIn recommended connections and saw a face I recognized, but could not place.... until I saw that they worked for the ambulance company that I had ridden with.

Did LinkedIn track both of our locations and figure out that we rode in the same vehicle at the same time? This is absolutely possible. Did LinkedIn use voice prints to confirm that his voice came through my phone and mine through his and therefore we had a conversation? Can do.

Did they?

Color me freaked out.