It shouldn't be that hard™ you just need to take the data from https://www.space-track.org/documentation and use some well-known formulas to turn your TLE into a ground track
"Neural correlates of interspecies perspective taking in the post-mortem Atlantic Salmon:
An argument for multiple comparisons correction" (http://prefrontal.org/files/posters/Bennett-Salmon-2009.pdf)
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(That doesn't mean you need to be federated or distributed on a technical level. You can have distributed moderation e.g. reddit, small group chats, etc. on a centralized platform)
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There is a reason every large service with central moderation is an under-moderated cesspit and our legal systems are regionally distributed. Local rules and rulings are the only effective way to scale these things up.
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There is one thing fedi actually does very well that any alternative must be evaluated against: The core problem that every social platform that desires to dump all users together into a big town square must, at some point, figure out how to scale moderation to that entire square.
No matter what claims are made about moderation initially, making quick, effective decisions that match user consensus centrally at any appreciable scale is both socially and economically infeasible.