This times a thousand. The problems we're seeing with social media sites and trolling, spam, harassment, low quality content, fake reviews, etc is because they're operating at a scale where human moderators are too expensive to use and stuck trying to use algorithms to solve human problems.
But that doesn't work. Until we have true human level AI (and honestly maybe not even then), decent curation has to be done by humans rather than machines. That's why forums tend to be less 'toxic' than Twitter or Facebook, because the moderators can view content and use their personal disgression while figuring out whether something breaks the rules and then act accordingly. It's why (somewhat surprisingly), the likes of SMW Central and MFGG have better quality control standards than Steam, the App store or other such services; because the moderators physically play through every game submitted and determine whether they're good enough to be accepted. It's why Amazon has an issue with counterfeit products nowadays, and why Google search has spam and blackhat SEO.
And it's not just humans that are needed for good moderation or curation either. It's humans with knowledge/experience in the field in question, and with enough interest to go all in on their work to make the community better. Those 'moderation sweatshops' some social media services use (the ones that check for illegal content and what not by getting a bunch of low wage workers to scan through content en mass) are as flawed an idea as the algorithms; they don't know what's acceptable beyond the very minimum.
But I guess that's the issue with many businesses and services and startups now. Everyone's trying to solve human problems with only code, and realising it (at least for the time being) just often doesn't work that well.