You can ban them for yourself by monitoring your own internet use, deleting mobile apps (and/or disabling notifications) and reducing news consumption in general. All of which are pretty solid protocols for most people to follow 365 days / year, actually.
I'd check out Leechblock NG (for Firefox and Chrome) if you need a short vacation from Lemmy or any other websites.
The 'general' package has basically fixed that for me:
https://github.com/noctuid/general.el
Makes it pretty simple to swap out most common emacs shortcuts for much more ergonomic alternatives.