This is a huge problem, and I think it's a good idea to legislate this (depending on the precise text of the bill) due to the positive externalities involved. I wrote a blog post making this argument:
NO! This is a private matter, not one for legislation. It simply gives big brother the means to stop us completely from talking with anyone not in shouting distance. Terribly, terribly dangerous.
http://andrewro.in/post/75915934983/forcing-antitheft-techno...