This intrigues me, so I just spent 15 minutes going through my texts, pics, history, and the worst thing I could find on my phone, was a meme sent to me by my fiance.
It is a picture of a woman in her doctors office, they are both dressed. He asks her if she is on "Any other form of birth control besides her bi....y personality ".
I remember when she sent that, I laughed.
If someone was to get ahold of my phone, and go through it, there is nothing to blackmail me with, arrest me for, or anything else. I'm going to guess that this is true for most people, so they have nothing to be concerned about.
If someone is a spy, drug dealer, selling corporate secrets, buying nukes, robbing banks, a hitman, well then I am all for them getting busted, and prosecuted, and doing 50 years in prison.