A hacky way to filter unwanted communities from showing up in your lemmy.ml feed
a link (Y) will show up next to the community name in your home feed posts which you can press to filter out all posts from that community
to undo a filtered community: you need to press 'H' key to halt filtering, then refresh the page, now you can see all posts, click 'N' link next to communities you no longer wish to filter.
press H again to toggle halting on/off - no need to refresh after turning halt off.
note: this is experimental and inefficient and will likely stop working on every site version upgrade.
tested only on tampermonkey/chrome in the main feed