I can see merit in these things under different circumstances, but there are so many different things that everytime I delve into it I come up with more things that are related.
I think unsecured bluetooth might be an issue, I don’t know if it can be secured from people modifying the configuration if they have bluetooth access.
I think if @geeksville gets MQTT support embedded Proposal for global messaging support then all these ideas could be built on top of meshtastic really easily, but I think you are probably right about them been out of scope for the base project.
The only concern I would have with opening it up so much to users just connecting adhoc is exceeding the duty cycle on the frequencies in use.