Regarding the post title: Lemmy itself allows you to block communities, instances, and users. But it does not support filtering by keyword, e.g. filtering out any post with the word “platypus” in the title regardless of where it was posted or by whom. With help from the comments below, here are some third party Lemmy clients that have their own implementation of keyword filtering:

  • Boost
  • Connect
  • Eternity
  • Interstellar
  • Raccoon
  • Summit
  • Sync
  • Tesseract
  • Thunder
  • Voyager

Do NOT support keyword filtering:

  • Alexandrite
  • Jerboa
  • Lemmy UI
  • mlmym
  • Next
  • Photon
  • Quiblr

Comment anything I have missed or mistakes I made

    • Zip2@feddit.uk
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      27 days ago

      And will also let you block entire instances, like say hexbear.

        • OpenStars@discuss.online
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          22 days ago

          Instance blocking despite all the promises turns out to be mostly a lie, and has actually gotten weaker with time. Although we were told to wait and then this feature would solve our personal defederation needs, the opposite turned out to be the case. On 0.19.3 it at least used to prevent notifications (confusingly enough), then on 0.19.5 it no longer does so.

          I still see every comment, they can reply to me, I can reply to them, and the only thing it ends up doing is hide communities - including auto-name-expansion with the exclamation mark. I wanted an actual “block” of an “instance”, but apparently I must move to another instance to get that:-(.

  • omgitsaheadcrab@sh.itjust.works
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    27 days ago

    Can you share a block list or good filter? I really couldn’t give a rats ass about US politics. I’m using Sync 🤔

    I just have Trump/Kamala/Biden/Republican/Democrat … etc as individual filters

    • FundMECFSResearch@lemmy.blahaj.zone
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      27 days ago

      Israel, Palestine, Hamas, Russia, Ukraine, Election, Terrorist, Vote (on my alt which is just to scroll and look at animal pics and memes)

      An honorable mention I’ve got on my blocklist is “shitlib” filters the hexbears and grads right out.

    • Mr_Blott@feddit.uk
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      27 days ago

      I’ll never understand people who think they can change someone else’s mind on the internet while arguing about religion or politics

    • FundMECFSResearch@lemmy.blahaj.zone
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      27 days ago

      I think you might have to respect that an anonymous forum on the internet where people regularly bicker and insult each other (atleast on politics posts) may not be everyone’s favourite way to interact with politics and news.

    • mindaika@lemmy.dbzer0.com
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      27 days ago

      I’ll never understand people who think reading that 6,251st column about how Biden is really totally definitely looking into legalizing cannabis constitutes “knowledge”