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There are a couple of users I recognize just because of the amount of duplicate/triplicate/quadruplicate posts I see from them, often times grouped up like that too.
Which... Why? There's no karma to farm here, just post it once and let the conversation happen there.
No offense to anyone, but I'm down voting duplicates to try to stop this shit.
Because there's more then one community of the same topic. They're actually doing a really good thing, they're trying to grow multiple communities. It's not karma farming here, it's supporting communities. That is much preferably then people only submitting to the biggest community and create more centralization.
The whole point of making a federated network of independent instances is to avoid the issues arising with one central instance, right? Putting the content out to multiple instances plays into that: If it's important content, no single authority can easily censor it, and the loss of a single instance won't erase it.
If it's trash, of course, every community in every instance you post it to will have to clean it up separately. Arguably, that puts more strain on the respective moderation teams, but if (ideally) those are disjunct people (again, to avoid the issues of a single authority), the strain should be distributed.
And on the plus side, it would enable each community (in the lemmy sense) to enforce their own nuanced rules, additionally leading to slightly more choice between the types of moderation you favour (as opposed to "There's one big sub, take it or leave it").
Individual communities may be smaller, but maybe some more form of coordination of similar communities across instances could amend that (like linking to the other communities in your sidebar etc.).
I could also imagine a super-community solution that would allow you to aggregate several communities across instances similar to multireddits. I'm new here, so I'm not sure if that exists, nor have I given the implementation any thought, but I suppose that could be convenient.
There are some who are trying to feed content to all communities instead of just choosing.