I think it's a bit too convenient to structure this as though the algorithms are doing anything more than mirroring people's own tendencies (in aggregate) in that regard. I think this showed up well a while back when there was a commercial during the Superbowl that used the term "likeagirl", and a huge part of the story eventually became the internet backlash against it and all those evil people. But there was very little initial response about that on Twitter, until there were stories saying that there were people offended about it on Twitter and so it created it as much as anything else. At some point, algorithms were showing what was popular, but the whole thing was so manufactured in general. The half dozen morons could've been ignored, but people called attention to it and made it into a thing. It's not that algorithms love outrage, it's that people love outrage. Algorithms reflect what people love, even if they don't always own up to it.