But a recording allows you to share what I have shown you (perhaps assuming it would remain a private matter) with the world. A video recording has a higher truth value than oral reproduction.
It does have a reputation of being a bit more trustworthy as it's (temporarily) harder to fake - but it is orthogonal to privacy. I would be able to disclose your secrets from memory, despite your assumptions.
In this sense Glass simply replicates a rather unusually good memory - and it may be obtained in natural ways; for example, some people really have absolutely 'photographic' memory due to a genetic or birth 'defect'.
And it is possible (likely?) that I might in future obtain such unusually good memory as well - through brain-improving drugs, genetic engineering or implants that augment my brain . Or, in a rather limited way, through Google Glass.
What I'm aiming at is that by banning such recordings in essence you would be banning people having a better / more accurate memory. And I see that as a Bad Thing - globally speaking, I'd like to see that people have a chance to improve beyond current body limitations. All of them.
Making a law that states "your memory must be fallible, imperfect and degrade with time, since that's how it's Always Been Done Here" seems, well, evil.
