I had the strangest interaction with the Messenger app a few months ago.
I was spending time with friends, and I took a few pictures of all of us (didn't send them through either FB or Messenger). A few hours later, messenger popped up a notification telling me something along the lines of "Hey, I see you took pictures today of <friend>. Want to send them to her?"
Made me feel incredibly creeped out that FB would take my photos and (presumably upload and) analyze them even when I hadn't given them to FB.
I was spending time with friends, and I took a few pictures of all of us (didn't send them through either FB or Messenger). A few hours later, messenger popped up a notification telling me something along the lines of "Hey, I see you took pictures today of <friend>. Want to send them to her?"
Made me feel incredibly creeped out that FB would take my photos and (presumably upload and) analyze them even when I hadn't given them to FB.