Indeed. One should think twice before posting anything here.

Also: No relay can possibly store all content if Nostr ever goes mainstream, so there is a chance that, unless you run your own relay or pay for one, public relays will only save a few days worth of your notes and then notes will simply disappear - which would actually be good as well.

I think social media should be a nervous system or neural network of society. Long-term memory should be blog posts.