Legal Spyware

There are programs created to spy someone with your knowledge. Lets say, you install such spyware to spy your kids, sometimes it's important to know what web pages does your kid visit, what is he writing while communicating with friends. Employee can be spied by his employer. What if your employee is working as follows: 1)after he came to work he have been browsing news portal for one hour; 2)another two hours he have been gaming "solitaire"; 3) What if creating simple word document took him forty minutes?. Remember! Using such programs breaks user rights until he doesn't know that someone is spying on him.