If you read your employment handbook you might be suprised that it allows you, your car, your office, your anything to be searched while you are on company property. You give that permission, if they require it, by signing that handbook. With the escalating violence in health care, in schools, theft of intellectual property, employees hacking work computers, and on and on- you can't expect any type of privacy on the job. In fact, many schools now allow students' persons, lockers, and etc. to be searched 'on the spot', with zero tolerance policies. And it's good policy to expect that while you are at work you are being recorded by cameras and your every keystroke is monitored, and that your conversations may even be recorded. And don't forget that it's increasingly common for families to install their own nanny cams in patients' rooms' whther it may be legal or not. Yes, Big Brother is here- he's been here for a long time. A workplace is private property- private property owners (as in any business )can make just about any rule they like, and they are almost always held up by the courts.
Separation of Church and State? Keep your personal life separate from your work life, in every imaginable way. And as far as Facebook, Twitter and the like I'd suggest just staying away from that stuff (every day we hear of people being fired for what they say and do online), but it seems that people just can't control their impulses.