Here is a sad fact to consider. The average company in the USA considers employees liabilities, not assets. In the world we live in, when almost anyone can sue anyone else for anything they want and WIN, a company has to take this view.
An extreme example:
A pilot has a myspace account that shows him or her doing "risky" things, skydiving, base jumping, etc. This pilot is then involved in a fatal accident where it APPEARS he/she went below mins. Family members of the pilot find the myspace account and sue the airline for having a "rogue" pilot on staff.
Extreme yes, but if it were to happen the families would probably win all sorts of money.