based on the list of instances made by @sunaurus@lemm.eehere - Thank you again for that work, it's highly appreciated.
This is a preventive measure against massive amounts of accounts being created for botting purposes. Most instances banned appear to be 1 user instances so we don't think this will have a great effect on anyone's usage of Beehaw. If you are an admin of one of those instances, feel free to contact us at support@beehaw.org
Currently it isn't and I don't think, that this would be the best idea ever since it could be misused as some kind of index to find bad instances. The defederated-list is available to the public and thus the defederating instance could in fact be "advertizing" the instances they defederated from ("Look, we don't want this stuff here, but these instances are for [right-wing|transphobes|bots|spammers|porn]")...
Depending on where the instance is hosted or where the admin lives, it might even be illegal to in fact point people to places where they can find certain things.
In my experience, it helps people new to the fediverse (specially if they want to start their own server) to know who to block/limit. People who actually want to be in those kind of massively defederated instance know how to join them and even have their own list of instances to join, without looking at the list from a small queer instance or even sites like JoinFediverse and the like.
There are a few different things I'd like to mention:
I don't think, that there is such a thing as a massively defederated instance exists right now. The most blocked instance is blocked by about 11% of the instances, followed by two instances at 6%
Even if the die hard scene users would know their instances, not every random troll or spammer would.
This doesn't address the possible legal issues of publicly announcing where someone could find illegal content
And lastly: If you're new to the fediverse you maybe shouldn't run your own instance in first place. Helping reckless people pull reckless stunts is a bad reason to promote a feature.