Is that really interesting? I would be surprised if people were more eager to make enemies and potentially make themselves look petty than to make friends.
We expect freedom and transparency in all aspects across the world irrespective of personal/social costs associated with it. Isn't it? So why exception in this case? Just because it is unwritten and some sort of convention inducing hypothetical fear? Won't it help future employees from joining such toxic work places? Just a view point.