I'm not sure how that article claims that spying is illegal. Typically it isn't illegal for a company to monitor is own equipment. That article says they can't

I'm not sure how that article claims that spying is illegal. Typically it isn't illegal for a company to monitor is own equipment. That article says they can't force you to divulge your social media password. Most companies prohibit you from doing personal stuff on your work computer. I'm not saying it is right, but I don't know if any laws in America that make it illegal.