"Gina Kensington was sacked by Air New Zealand earlier this year following a dispute over sick leave she took to care for her sister. She said she did not misuse sick leave, and went to the Employment Relations Authority (ERA) seeking reinstatement. Air New Zealand responded by demanding to see her Facebook and bank details. Kensington refused, saying it did not have that information when it dismissed her and that 'it is well accepted in New Zealand there are general and legal privacy expectations about people's personal and financial information.'"
At least in the U.S., Facebook isn't keen on employers getting access to employees' Facebook account details.
http://yro.slashdot.org/story/13/08/11/027217/new-zealand-court-orders-facebook-disclosure-to-employer