This take is coming from my experience of working as a sports journalist in a country with strong and highly polarized hooligan groups.
Social media groups or profiles are the primary means of sports news dissemination. That is the unofficial groups revolving around a certain club, something like "Real Madrid fans forever" page on Facebook, or "Chelsea hooligans" profile on Twitter. Just examples.
The legit media sites rent the chance to post their articles on the page/profile because they get a lot of visits that way. In order to make the post more clickable, they'll post the link with an inflammatory caption. Especially if the article is referring to the rivals and their negative statements towards one's own club. So they would write "the mice are yelling again" or "the honourless pussies are lying again".
With the day-in-day-out rhetoric of this style, the group's audience is getting more extremist. The opposite side stops being your neighbours or schoolmates, they are the "others". Groups and sports news sites are radicalizing the viewership for puny clicks, angering the mass and making violence more acceptible. Instead of fists, the hooligans revert to using bats, knifes, or guns.
Yet no one is held accountable for this poisoning!
So I propose to make it mandatory for the admins of social media groups with large followings to be publicly known, with name, surname and photo. For instance, if they go over 10,000 members or an agreed number. The journalist who shares the post via the page should also be credited. This will stop the vicious rhetoric from being used.
Groups doing the service of media houses now. Yet news organisations have an editor that is known and responsible for what he and his subordinates publish. Social media pages should follow the same principle.