This is how it began for me. Not chatting on line, per say, but leaving for work early and coming home late, etc. Turns out my blushing bride was putting in some overtime, but this kind of activity could not be claimed on her time card.
Just as a side note, Facebook is now responsible for 25% of all divorces in the United States (2011).
Facebook was a bad idea to begin with, but good for the CIA who sponsors the site. Turns out that Facebook users save the CIA tens of millions of dollars and tens of thousands of man hours - getting people to tell everything about their lives and the lives of their friends, not to mention supplying pictures of everyone they know, including dates, and travel itineraries. Scary stuff.