Ironically the people who will get all excited about nonsense like this are those who can’t leave Facebook and Twitter alone and go apoplectic if they can’t find their cellphone.
There was a FR comment in one of the Ukraine protest threads where the protestors in the area got automated text messages to their phones saying something like “Please be aware that you have been traced to the protest area during the riot”. Not sure if it is true (there was a photo of the text). I know they CAN trace them, but why warn them? Unless perhaps to get people to leave just from the fear.
I am on FB to keep up with relatives and friends plus many conservative groups. Just saw a picture of a relative and daughter with one of The Duck Commander stars. I have probably been on the radar for years since I had a few pen pals in The USSR. They were fascinating. FB is what a person makes it. They are going to find any info they want to and I refuse to play fraidy cat. They probably find more info about me here.