Being able to filter even by simple regex would be so much better than Facebook/Google’s “algorithm.” But it would allow us to filter out ads.
It would also allow for community-driven white/black lists.
But again, wouldn’t allow Coke and HBO to make you look at stuff.
By virtue of delivering content to your browser, Facebook has put the power in your hands. It's how you use your browser that determines what you see. ;)
Having a toxic sub-community leaks into other communities. I've noticed that myself, the /lit/ subboard no literate on 4chan has been taken over by /pol/ users.
It has been shown that when Reddit banned two toxic subreddits, the users of those subreddits either left completely or drastically reduced their hate speech in other subreddits:
>Within the frame RQ1 and RQ2 provide, we find that the ban worked for Reddit. Many more accounts than expected discontinued their use of the site; and, among those that stayed active, there was a drastic decrease (of at least 80%) in their hate speech use
See http://comp.social.gatech.edu/papers/cscw18-chand-hate.pdf
In other words, even if you filter your own subreddits to the ones you 'like', chances are that the toxicity leaks into your favorites.
(This is the same paper quoted in the OP's text)
Filtering just enhances the echo chamber, it's true that social networks are proactive about it and "pre-filter" things but I think they're actually getting pretty good about it, they give the users what they want. And what we want is content that agrees with us, makes us feel right and confirms our biases. People effectively "filter" by selecting who they follow, what they subscribe to etc...
Furthermore I don't think filtering "toxicity" on huge open communities can really work because most people out there are terrible at "not feeding the trolls". I've tried /ignoring trolls on IRC for instance, but then you're left with the messages of other people engaging the troll and it's somewhat even worse because you don't have the context. Then you try to block the people replying to the troll but then you have people replying to the people replying to the troll...
Personally I feel it's mostly a non problem, I don't have twitter, I don't have a reddit account, I don't have facebook... I'm only active on smaller communities like HN. I think humans simply suck at behaving correctly in large crowds, especially anonymously online. There's no fixing reddit or facebook, they've just become the modern equivalent of scribbling a swastika on a bathroom stall. Cat gifs, pun threads, racist comments, it's the same thing really, instant gratification without any effort, just watch the karma go up or down. If you don't set any bar for acceptable content then you're bound to be overrun with low-effort content.
Didn't it get rid of them a year ago?
Also that is why I enjoy playing Valve's online games and not Blizzard's or Riot's. No politics or baby sitting. Just the ability to mute everyone if you so choose. The "no BS" approach is also quite apparent in the game design itself too