No way. As a head director at a large 6A high school, this is a BS attitude. You don't treat the people you work with like this as it is the fastest way to breed resentment and push people away (and negate any hard work you're trying to do to advance your program). You do as much as you can during the school day and only do what you absolutely must do after school. Once that's done, you go home. Period. End of story. The attitude of staying late just to stay late is the number one reason why people are getting out of this profession in droves.