What's important to note is it blocks all the subs from that instinance, but not posts those users make to other instances.
And you'll still see all their comments, but you won't get notified if someone from those instances reply to you. You can still see them and reply back, but you won't be notified
The lemmy.cafe instance is defederated from lemmy.ml and hexbear. If you use a lemmy.cafe account, you won't see any post/comment/communities from users of those instances.
For me, this works better than having to block users one by one. Lemmy is only tolerable to me because of this option.
The best way is to make an account on a server that doesn't federate with them. Sh.itjust.works, lemmy.world, and most other large servers are defederated from hexbear and lemmygrad.ml.
Apparently lemmy.cafe is defederated from those as well as lemmy.ml. Be aware that a good chunk of major communities are hosted in lemmy.ml, so you won't be able to access those if you're defederated.
Unfortunately even if you block them, you will still see posts and comments that users from that server make on external communities. It's only by being fully defederated that you won't be able to see any of their content at all.
Yeah I guess that's true, they are defederated from us but technically we aren't defederated from them. But they still can't see anything that SJW users post or participate in our communities. And same for lemmy.world, etc.
So you only really see them when they comment on lemmy.ml communities for the most part. There are a lot of lemmy.ml sublemmies to be fair.
You can also block the instance at the account settings level (Blocks tab). That way you will not see posts from these instances on both the webUI and mobile apps.
Sadly it doesn't have a toggle to block comments and post from users of these instances made on communities outside of these blocked instances
It already does, and was in kbin day one (of reddit Exodus). Look in your settings for the block domains area. Unfortunately the feature to add a domain block only worked on desktop for me.
I tried that feature. It only blocks links / posts with those servers - as in, if somebody makes a post and puts a link to that server as the topic, then that post won't show up. Unless a new feature was introduced, I'm afraid that's it.