+1001 AMEN AMEN AMEN AMEN facebook is not to blame.
If their marriage was not over in their (own minds) they would not be looking!
Lots of peoples marriages are over and they "Know It" they are just not being honest.
Look at all the QUESTIONABLE relationships that people are having everywhere!!!!! That is not facebooks fault it is EVERYWHERE!!!! Even in our CHURCHES! I read a book many years ago and it said that more than 50% of all affairs happen inside a church door. "Secrets of your Family Tree" I will look up the author.
I see it as a MENTAL DIVORCE. IT IS affecting our WHOLE society not to mention our children and family life.
People need to take responsiblilty for what they have done by hurting children, families, marriages and the like. It is time to turn this around and stop the blame game.