Maybe the medium is new but the ethics are old, even older than Adorno who lived for disagreement. Aristotle’s agon was also about friendship, where there is “no need of justice,” by which he means, you should and often have an obligation to disagree, but there is a social contract in which one treats the other as a friend and citizen. It’s hard to know what kind of social contract exists on Twitter or what friendship and justice mean in these newer contexts.