This is more about developers carelessly integrating 3rd party code into their extension without verifying if it’s malicious. People should be able to spot this if it’s a widely reviewed open source extension. At the end of the day, you have to make sure you trust the developer that they have sound programming skills and decent security knowledge to not be duped into adding code from an untrusted source just because of an offer for income.
Lemmy people, this post literally showed up five times in a row on my feed across 5 different subs. How do I fix that?
Hopefully one day we’ll have smart clients which will optionally merge posts and underlying comments with common titles / URLs
Ask your client developer to implement cross-post support.
Currently you don’t.
The real underlying issue for this all is that the “Hot” sorting algorithm Lemmy (and Kbin) uses is terrible - if someone posts the same thing in 5 different big & popular (i.e “hot”) communities at the same time, there’s a good chance you’ll see all those five posts all next to each other on your feed even if one has 100 votes and the others have 30 - note how they are all “6 hours ago”.