I don't understand why people don't name these sort of guys. I mean, it's not slander or anything, if it was actually said, you're in the clear to name the person who said it, no?
Or it could be that they're just an asshole, but there will always be assholes. Much better to make everybody aware of asshole behavior patterns. Then they're ready to deal with the situation, which they're much more likely to encounter than the specific idiot.
On the other hand, how else do people know who these people are? There's no way for us to know if this is a mistake or a common occurrence.