Do you, or would you, let a Boss or Supervisor discipline you off company time?
What I am trying to say, sure the boss can phone and say you screwed up, we will talk about it next time your in.
What I wont put up with is being screamed at over a screw up at work on my own time, and have told the boss that, they usually calm down and say fine.
If it is that important I can always go back into work and clock in and they can yell then, funny no one has ever said it was that important.
How about you, do you take shit from a boss on your own time, or not?