They're kids for the most part. I worked for Geek Squad when I was under 20 and saw this kind of stuff all of the time from similar-aged coworkers. I hear you that you expect better but when you hire people who were (or still are) teens and pay people just above minimum wage you can't really expect to get professionals.
I'm considering it from more of a social perspective. It is socially unacceptable for someone to snoop through someone else's personal photos. Many young children would understand this, and teens certainly do.
