You can get in a peck of trouble on-line if you fail to play by the laws of society.
You can be fired from your job for playing when you should've been working on your boss's computer.
You can be prosecuted for downloading kiddie porn by state or federal authorities. There's a distinction between employment in government and employment in the private sector respecting whether your expectation of privacy is reasonable or not. If you work for the government, you may have a harder sell on the idea that your agency had no right to look at what you considered private but that it does not.
This week the U.S. Ninth Circuit Court of Appeal upheld, in a case called U.S. v. Ziegler the federal criminal conviction of a federal employee who downloaded kiddie-porn onto his agency computer.
Sherlock Holmes, my private eye, has been heard to say, "There's no defense to stupidity."
Here's a comment with a link to the case.