With the new HIPPA laws I doubt you can see people's health file without credentials to look at them.
My hubby works in a doc's office and one person was fired cause she looked into a file that she has no business accessing. She could supply no good reason either when they saw she went into them. It's all on the computer and recorded who sees what.
Before I guess if you worked in a doc's or insurance office you could get all kinds of goody info on your friends and neighbors. That was not a good thing for people's privacy.