On kbin and I think most major lemmy instances, you can block communities, so if you don’t want to see content from them, say redditmigration posts, you can filter the whole community. That won’t stop you from say seeing it in unrelated communities, in which case blocking the users who keep bring it up reduces visibility of the topic even more. Finally setting your default page to your subs rather than top reduces the visibility of unwanted topics even more.
On kbin and I think most major lemmy instances, you can block communities, so if you don’t want to see content from them, say redditmigration posts, you can filter the whole community. That won’t stop you from say seeing it in unrelated communities, in which case blocking the users who keep bring it up reduces visibility of the topic even more. Finally setting your default page to your subs rather than top reduces the visibility of unwanted topics even more.