There's always the paper bag solution.

Most scanners to date have been moderately vulnerable to blocking devices. Say, a backscatter laser of some sort. And if personal identifiers are based on you carrying a broadcast device (e.g.: an info-leaking phone), one simple solution is ... don't do that.

I suspect that both the technology and its countermeasures will first be utilized by government (and corporate) "security forces".

Hrm ... related query: is it possible to build a simple device which would short out RFID scanners? If it becomes trivial enough to destroy the readers, then ubiquitous, obnoxious uses might at least become more expensive.

I don't think you are getting rid of RFID, they are too cheap and low-tech to get rid of. I hear Aluminium foil does the trick.

RFID has its uses.

It's also got its abuses.

The tags are cheap. The scanners somewhat less so (especially when you add the labor cost of repair/replacement).

I'm not talking about killing in-store scanners and the like. However if I was aware of privacy-stealing roaming scanners in places they had no business to be in ... well. Raising the cost of data acquisition might be an entertaining hobby.

In all honesty probably wear a pair of those glasses - If we are all wearing e-glasses, facial recognition may not be so plausible.

I think Google is usually pretty forward about their privacy policies and letting you customize what data they store. (See those recent "this stuff is important" popups on virtually every Google property)

Here's hoping they thought of issues like: Guy wears his new "Google Goggles" to a racy late-night sales meeting, and Gmail serves how wife ads for divorce papers.

Well hey, just create a Google Plus account and update your settings...

But really, the privacy implications are significant. I think Google knows this, and will take the necessary steps. At least, I sure hope so.

I think the real issue is how to respond to my wearing a camera that records everything I do and, incidentally, everything that everyone around me does. Even if the data's never sent to a third party, there are still privacy concerns. They're just a lot harder to address, unless "ban lifelogging" strikes you as a reasonable response. (It doesn't me.)

Makeup?