because they could be viewing all their private communication/media on their device and that causes a lot of anxiety cause they won't confirm or deny if they have access.
Ugh, yeah, if this was not someone I know, the pictures, yikes !
what pictures?
It's basically the equivalent of someone in the 80s tapping your phone line.
Rather someone in the 80 changing the numbers on your phone book so that you dial a wrong number.