Lest anyone think this is pure hypothetical, this happened to me. When I was 6 or 7 years old, my parents let me have an account on the family computer. I cou

Lest anyone think this is pure hypothetical, this happened to me. When I was 6 or 7 years old, my parents let me have an account on the family computer. I couldn't do anything particularly destructive, and didn't spend an overt amount of time on it. Mostly, I would press random keyboard keys into the browser's URL bar. One day, I ended up at a website that said 'must be 18 or over to access'. (I suspect it was a credit card scam, not porn, but the point still stands.) Next time I logged into that computer, I found myself unable to start the webbrowser.