They'd best be prepared to enforce it evenly, then, or the next suit is "my boss called me a dickhead 43 times without any consequences, and that's discriminatory".
Which is another loss for the common employee, because now if you mistakenly violate one of those voluminous company policies or you're having a bad day and make a small lapse of judgment, they're going to feel obligated to punish you for it to avoid more legal infractions.
Or, as said rules also apply to the boss, they might feel obligated to be a bit more reasonable.
In this case, all they had to do was issue a warning - as they promosed to do in the contract - instead of a summary firing for the first offense. If the behavior reoccurred they'd have been clear.
