For example, people on Reddit asking redundant questions and give equally redundant or unhelpful answers.
Whenever every ‘What’s the worst show you’ve seen?’ is asked, you’ll get 10,000 “Kardashians” answers, which is just easy karma farming.
If someone posts in a community that’s geared for something like opinions, but someone elects to just go on a full scale rant instead.
That’s already kind of happening. the main two communities are lemmy.world and lemmy.lm. And since different instances can defederate from each other that can cause the same echo chambers we saw on reddit. Here’s a list of everything you can’t see if you’re on lemmy.world: https://fba.ryona.agency/?reverse=lemmy.world
Thankfully you can go out and make an account on an instance like lemmy.sdf.org that doesn’t block anything but I don’t think it’s a perfect solution.