Curious, since I know I can block communities of instances. Is instance-wide blocking only available to admins of instances?
Probably the best way would be to report insurance to admins.
Currently yes. If you wanted to be in full control of which instances you can see, then you will need to administrate your own instance.
Hopefully this will change in the future!
Same discussion is happening in another post, I just commented there summarizing the options: https://lemmy.world/comment/36886
But yeah, instance blocking is an instance-wide admin function. More details in my other comment.
i don’t know, but i have 2 alternative if it’s not possible
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never click “all”
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if you don’t have an exhaustive list of instances to block you might be able to find an instance that does block what you want