Is this supposed to be surprising? Hell, I don't even work IT and I've had to deal with this before at work. People who don't know computers do stupid things with them. Or they do things they don't realize will still be on the computer next week when they're back at the office on the corporate network. Shocking!
As for "potentially embarrassing" that means so little as to be useless. Nothing embarrasses me but I have coworkers that would be embarrassed if you heard them sneeze. There's such a spectrum to that it's completely irrelevant.