Thus you are the one speaking from a place a minimal compassion. Think on that.
Let me put more emphasis on what I thought was implied but didn't get through. I think these things need to be part of a job description.
If the expectation is MADE clear to the employee before he is hired, then it's fair game. He volunteered for this stuff. I am not advocating forcing this stuff onto people who didn't know about it.
The problem is etiquette. It's sort of not good to put this in the job description officially so employers need to somehow subtly convey this employees that this is what will be expected.