If your only lemmy account resides on that instance, then I would encourage you to download LASIM (Lemmy Account Settings Instance Migrator) (source: https://github.com/CMahaff/lasim ) and run that to export all your subscriptions. I’d also encourage you to set up one or two more lemmy backup accounts on other instances and import your user subscriptions and settings to those other instances. Doing this now, while your current instance is still running, would save you a lot of pain and suffering later if that instance you are using is just shut down or deleted.
Since lemmy instances are owned fully by their admins, there’s no concept of allowing a hostile takeover of someone else’s instance. Just the thought of this is a little absurd and would already have been exploited for wrongdoing if it were possible.
Yes. I have been preaching that since I first started using lemmy in June. Every time I bring it up my comment is downvoted to oblivion. The way it currently works is borderline abusive to new users of lemmy.