@malte there's an extension called uBlacklist that lets you hide domains from search results, and people can curate and share lists with others:
https://addons.mozilla.org/en-US/firefox/addon/ublacklist/

for example:
https://github.com/laylavish/uBlockOrigin-HUGE-AI-Blocklist

@malte [cue hundreds of bots plugging into the extension and simulating the keypress on every single website]