An hour? Two? However long he decided to stay, it was unacceptable for the employee to post a snotty message on the door for the public to see.
I already told you what I would do: I would call the manager’s manager, or the owner, after leaving multiple voicemails for the manager himself. I would try to rearrange my schedule to work the next shift. If I couldn’t rearrange my schedule, and there was a dire emergency, then I would reluctantly close the doors but under no circumstances would I have posted a notice like that on the door! The notice alone should be a firing offense.
And how do you know all this had not already been tried?
How do you know this wasn’t the 10th or 20th time this had happened and nothing had been done, and he was finally just fed up. After all he did tell her this might get him fired.
Very much doubt this was the 1st time, or even the 5th time.
How many times would you put up with this?