At ATC, you can debate people you disagree with by posting your opinion. You don't have to put someone's name in the subject thread. It makes it appear that you are debating an individual PERSON instead of an ISSUE or a POINT. You can reference the TOPIC of the other thread without using the person's username in the subject. I just scanned down the entire ATC page and was not able to find one username in the title of a thread. WHEN is that done here?