Use of NFC tags for making a local knowledge repository is super cool idea and doable. Each NFC tag could load a specific profile or chat group or whatever you like for people to contribute knowledge to the stack.
You can use Nostr as backend and separate from the online social media presence while still being internet connected.
The idea would be to set up a private relay (e.g. with SW2) with some keys defined to read and write, then to use Jumble to view and post to ONLY that relay.
Whole flow could look like
User tap NFC tag
Opens a Jumble URL that is a npub or event for knowledge on that particular site
It queries your private relay and brings down whatever notes are saved there
User can read those notes
User can post new note back to your private relay
No one on Nostr need ever know or see these notes, and users need not see any other Nostr content, only your private relay content.
Optionally could fork Jumble to strip back and streamline it even further for the task.
nostr:nprofile1qqsgzfdez8ksa9xmuvqg5zly3nl9e5xqkpvj8nllj9aw06ra4pqq3qcpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhszrnhwden5te0dehhxtnvdakz7qgswaehxw309ahx7um5wghx6mmd9uqdl3vp is super responsive too and would probably take feedback on an awesome use case like this.
