Ok, here's the mock up for the sticker to be put up in public spaces, which gives access to a nostr private key, a shared pseudonymous nostr account. Just as an experiment:

This could either be really curious or boring, maybe no one will use it/know what to do with it or maybe I shouldn't do this at all 👀👀🤔? I'm still unsure lol. I would be somewhat responsible for whatever happens. Hmmm