If you like your Nurse Manager or Supervisor and your peers, and if you are a unit that works as a team (few and far between) then yes I have worked many an off day. But if you do not get respect as a professional, yes, don't answer the phone. Unfortunately, I have been on the management side of Nursing too, and if if you respect your staff and treat them the way they should be treated, most will walk through fire for you.