I had to go out today on short notice, so called a babysitting agency who supplied a woman from their pool of sitters. I'd never met her before, but felt comfortable as the agency does police checks, etc before they add the person to their books. I've used the agency in the past, and have been pleased.
After I paid the sitter and sent her home, I went to my computer, and can see that she sent 2 emails from my email address! I'm very unhappy that she went into my office, and very unhappy that she used my computer/my email account. I also can't quite believe that she'd be stupid enough not to delete the emails or at least log on to her own account to send messages! I guess she didn't think there was anything wrong with it, or she'd have made an effort to "cover her tracks".
Would you be upset? Would you do anything other than make a mental note never to use her again?