You have said that you know that the best tactic is to avoid these people, which presumably is through experience. So why do you say that you're "Confused" and

You have said that you know that the best tactic is to avoid these people, which presumably is through experience. So why do you say that you're "Confused" and "Puzzled" at why this article exists? It's a well known sales tactic as you say, but it's obviously not universally known, so instead of acting superior and declaring yourself "puzzled", let other people have the benefit of learning it too.