It comes down to intention. If you intend to only use someone as an example of what not to do to others, then you don't see value in politeness. If your crit

It comes down to intention. If you intend to only use someone as an example of what not to do to others, then you don't see value in politeness. If your critique is meant to help the person or at least change the criticized behavior , then you should be polite. Politeness works wonders. I think people intended the former and forgot about the real person.