I read an article that a UK guy was coming to visit his girlfriend in Chicago and planned to stay with her for 2-3 months in the summer. Before he boarded his flight, he got in a fight on WhatsApp with his girlfriend. In his message to her, he said something along the lines of, “What else do you want me to do? I’m moving to the US to be with you!” (referencing his perfectly legal 2-3 month summer stay).

CBP seized his phone at border, saw this specific text message and assumed it was him trying to immigrate illegally (though he still had apartment and everything back in the UK). They banned him from entering the US for so many years and forced him to go back to the UK that day.

I’ll try to find the article, but it’s been a bunch of stuff like this, and a bunch of stuff like business people, employees and lawyers with sensitive information on laptops and phones they aren’t allowed to have searched due to NDAs and other strict privacy reasons.