> Yeah, it's "frowned upon" for _anyone_ to do paid editing, clearly. But "frowned upon" is not usually a good reason to fire someone.

At least in at will or semi at will employment situations, it is not necessary for the employee handbook to be as exhaustive as a penal code.

There's nothing written anywhere that says that I am forbidden from telling one of our customers to die in a fire, but doing so is certainly frowned upon and would get me fired. I don't see any need for all such implicit rules to be codified.