>If we were not on an anonymous website, we would probably not start the conversation with “I disagree.”.

This reminds me of an Abraham Lincoln story (I think I read it in How to Win Friends and Influence People)...anyway Lincoln used to pen anonymous writings attacking people, and in one instance he was found out and challenged to a duel. The men squared off with long swords but called a truce prior to the start...Lincoln never penned a negative thing about a person again.