This is written as if they clearly knew the expectations of the role that day. Sit in an office, don't leave your post. I highly doubt they were filling in for another person, but if they were, they are responsible for the expectations of their job no matter where they are posted... and for telling the person assigning them the post if they are not prepared for that post. I am a boss. I succeed very easily as a manager because I make expectations clear and specific and the consequences fair. Few things ruin the dynamic of a work group quite like a manager or boss making exceptions for one person's mistakes while reprimanding the same actions for others. There is a reason why rules and expectations are established, especially in security situations. Lacking knowledge doesn't excuse security violations, no matter how cruddy it seems. if being consistent and holding a worker accountable for their choices as an employee make you think I'm a potentially bad boss, I'm glad I've not employed you... because it is the people that expect exceptions that struggle with entitlement in the workplace the most, I've found. They are the people that acknowledge that they got the info but thought that this one time would be okay. after all, it's just lunch right? Except it's not when you consider what such disregard could indicate. but I digress... As long as my staff is meeting expectations and fulfilling the needs of my clients, we have a great deal of fun, with a flexible work environment. However, I don't play games. The benefit of consistency is that employees always have a way to know what to expect. If an employee of mine fails to meet expectations, they are held accountable. I'm certainly not going to apologize for expecting professionals to act as such :)

Seriously why are you Americans not striking for beter work conditions? It's really weird what kind of things are legal in America.