@fu @lnxw48a1

I did find this in the docs.

Federation Lemmy Documentation
https://join-lemmy.org/docs/en/contributors/05-federation.html

>Block User
>
>Blocks a user so he can't participate anymore. The scope is determined by the target field: either a community, or a whole instance. The removeData field can optionally be set to indicate that all previous posts of the user should be deleted.

It also includes an expire date/time field, so I guess it is the same as a ban.

It does seem rather harsh that someone who could be discussing (assume a polite difference of view) something that a mod (with an objection to the view) on a different instance can ban them globally for it.