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.
The only one I know of is !homeimprovement@lemmy.world (sorry if I didn’t get that link correct). Not much traffic yet, but a few people have posted issues.
(Note - I used home improvement as an example of a general type of community that I subscribe to. I don’t know if lemmy.world was one of the ones I saw people pushing to defederate.)