I suspect that it&#x27;s now a solvable problem to determine if the first few messages from an account are, if not &quot;harassment&quot;, at the least... argumentative. Angry. Uncharitable. Sentiment analysis is pretty well-established, as is figuring out what people are talking about for the purpose of advertising at them.<p>If a new account joins and immediately starts expressing strong opinions on, say, a certain Breitbart reporter and how much ethics is in his journalism, <i>whatever</i> those opinions are, those don&#x27;t need to be sent as notifications or show up as a reply to other tweets. It&#x27;s not like Twitter guarantees reliable delivery, anyway. If they&#x27;ve been around on Twitter for a bit, sure.<p>But it&#x27;s not as clearly in the interest of profit as identifying advertising interests (or even identifying spammers).