If only we had some kind of warning?!? If only there was something we could do about it?!?
What you're describing is a cult or psychosis. Stopping it is a good thing, not something to be worried about.
Replace her existing account with a new one. Make up some excuse. Use the don't recommend channel option when a bad recommendation comes up.
We need a central registry of communities, aka subreddits, and users.
Figuring out if two posts are identical is going to be a challenge.
Some people are going to cross post but post slightly differently on each instance because they don't know if their post will be federated
Maybe group by hashtag instead of community name?
We should steal the ideas that were good with Reddit and Twitter
@HunterBidensLapDog
@infosec.pub