(RF)ID privacy in California

It is now illegal in California to implant an identifying device under someone's skin without permission.

The law, introduced by Silicon Valley state senator Joe Simitian, seems reasonably well-drafted (keeping in mind that I'm not a lawyer) and is to be "liberally construed so as to protect privacy and bodily integrity."

This seems like a reasonable step in a good direction, but I can't help feeling something's missing, somewhere.