Nobody wants to work overtime if they don’t have to. Unfortunately, sometimes it’s a necessity that your job requires. But, sometimes, working overtime isn’t either of your decisions. It can absolutely be the fault of some unruly clients. It’s up to you how you choose to handle that, but we have to give props to these guys for their response.
That’s a pretty ingenious way of saying “it’s time to go home”! If you can get out of overtime, you should do anything you can (legally)! There’s nothing like getting out of it with some good old-fashioned intimidation. If we were the other party, we would absolutely react the same way.