Fediverse

In Lemmy, no way.

In Tesseract (yes, that Tesseract!) there was a partial way, but only if the posts happened to come in as part of the same batch when accessing the instance. db0 helpfully made a fork of that, but the community outcry was so enormous that several instances simply dropped support of it entirely rather than switch to using that fork.

In PieFed, partially, but only for those sharing the same URL (like these examples probably do?) - so text-only posts do not qualify.

And then 3rd-party apps add a whole new dimension to this, by replacing the Lemmy/PieFed/PyLova/Mbin front-end with their own stuff. Note that Voyager provides only rudimentary support for PieFed. Overall, app support for the improvements that PieFed makes over Lemmy is still fairly shitty, sorry to say - note that you can tweak some settings in a web browser (like user blocks & such that are entirely impossible in Lemmy) and then that affects your using the 3rd-party app on a more daily basis, but many of the more advanced features of PieFed/PyLova are still inaccessible from most 3rd-party apps. See this wiki page for more details - like "Crosspost comment merge" is only supported in Interstellar, and some features (like a mod locking a post) is not available from any app, iOS or Android.

Lemmy is the same way - reducing such crossposts an extremely often-requested feature, for both software platforms, but so far I think only PieFed accessed via a web browser can do it even partially. Or certain 3rd-party apps (not sure which ones, though I've looked at several FLOSS offerings and did not see that - maybe only paid ones do?)

Technically the default Lemmy UI does hide the dupes, although it may still be buggy. Probably worth revisiting this once v1.0 launches. I'm not sure which apps do and don't do that though.

Connect app stacks them together and shows the replies from each thread in batches

My understanding is that Piefed does group the posts together, but that no apps currently implement that feature.

From Munkisquisher@lemmy.nz, it sounds like the Connect app does stack the posts, but that may be through their own feature and not Piefed's (no idea). I just looked for a site or post that compared app features and couldn't find one that listed grouping cross-posts.

My recollection is that Lemmy 1.0 may have cross-post grouping, but I don't see it listed as a feature on 1.0 beta testing post.

Multi-comms are a planned future feature IIRC.

Yep. That would be very nice, especially when crawling "new".

I think it's more of an etiquette problem than a feature problem. Posting the same thing to many different communities should be deleted as spam. The multipost in your screenshot is certainly spam. Report that.

If you want to post something and don't know which community fits best, or feel like multiple could fit, then just post your thing to one community. If other people find your post especially interesting, they can crosspost it. To me, cross-posting your own posts is a sign of an overinflated sense of self-importance.

I block the person who spam posts. Then I never have to worry about seeing their posts again.

Karma farmers gonna farm.