I'd like to ask anyone within RF earshot to carry my packets. I'd even consider paying for faster bandwidth if others were offering below some threshold. Some common low bandwidth communication should always work, say some fraction (split between freeloading users) of 20% of the link speed. I'll carry your packets if you're in earshot, rebroadcasting as needed, following the same rules. We could rotate our source addresses every so often.
You'd be persona non-grata (illegal) if you're recording and sharing who you hear. At the heart of it, saving and recording in perpetuity who you're communicating with and where ought to be illegal. Certainly selling that data should be too, or you end up with what we have today.