For what actual gain? What percentage of a normal friendly conversation is something you want to actually review and document. Less than 5%?
We don't need to jam these adversarially, we need a wireless protocol that enables polite behavior. Imagine if you were walking around broadcasting "I'm recording" and you run across somebody broadcasting "please don't record". The devices could prompt a conversation between humans.
Changing the dynamic to one that's resolved initially (rather than later, when somebody's upset because they didn't know they were being recorded) would be a significant shift I think.
The majority (39/50) of states only require the consent of a single party to record a conversation. If you want to take issue with other people recording conversations they have with you, that is something you should take up with your state's legislature.
It's never polite to record when you know the other party does not consent, but I'm not sure it should be illegal.
Even in this thread you can see differing opinions on the privacy aspects of this device. When talking about something as important as privacy, I don't think we can afford to just hope everyone agrees with us and... what, ignore the people who don't? That doesn't seem good for society or people living in them.
https://www.youtube.com/watch?v=FyeCn7HlLck
Younger ears find it excruciating though.