Do you visit websites that have a "share on facebook" button? They're tracking you.

Talk to people who have downloaded Facebook or Instagram to their phones? They're tracking you.

Have someone take a picture of you, even incidentally in the background in public, and post it to Facebook? They're tracking you.

They're literally shameless stalkers who suck up as much data as possible through every possible avenue to do entity resolution to track individuals to the degree they possibly can.

This is mass, corporatized surveillance, and we shouldn't suffer it.