The science says yes, at least one study did. I can just barely relate to this since I haven't had an ex since the invention of FB, and I don't have a personal FB account. I do have a FB account for my business, and I agree it's better to un-friend an employee when they leave, for whatever reason. How do you handle it and how does it work out for you?
http://io9.com/5944991/science-proves-th...n-facebook
http://io9.com/5944991/science-proves-th...n-facebook