Alex, I agree with you in regard to crossing the line. We are all reasonably educated and we should be able to berate, humiliate, accuse, and belittle people without resorting to name calling and profanity.
I have noticed that when someone is accused of something, the accused person quickly resorts to profanity and name calling. A rational response to an accusation would go a long way toward defending a position and getting some respect.
Rick