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What the fediverse needs is....CIRCLES!
(lemmy.world)
A community to talk about the Fediverse and all it's related services using ActivityPub (Mastodon, Lemmy, KBin, etc).
If you wanted to get help with moderating your own community then head over to !moderators@lemmy.world!
Learn more at these websites: Join The Fediverse Wiki, Fediverse.info, Wikipedia Page, The Federation Info (Stats), FediDB (Stats), Sub Rehab (Reddit Migration), Search Lemmy
This would be massively exploitable by anyone who wanted to know the personal networks of someone they wanted to harass (and businesses wanting to scrape and make shadow profiles on consumer connections).
All you need is their email, since you're doing this before you make an account, you can see all their personal connections and start to use that information to aid in your harassment of them.
Good idea in theory, but it needs a lot of work for showtime.
I think you're kind of misunderstanding what I'm saying.
You wouldn't see where an individual user is. You would see "If I sign up to lemmy.world, I'll have 300,000 people combined across these instances. The people signed up at any of these are counted in that 300,000. They'll see my content, and I'll see their content. But if I sign up to hexbear, my circle will be much lower, because that instance defederates from the majority of users. So my content will only be seen by 50,000 users."
Made up numbers for the sake of proof of concept.