What's interesting is that some recording is acceptable to people. A friend researches lifelogging (methods to record your life experience). He has worn a Sensecam (a device that takes still pictures every 30 seconds all day long, with a button for 'I am using the restroom now') with no complaints from anyone. He explains what he's doing and they are fine (it's very visible hanging around his neck). He asked a student to wear a Sensecam with a sound recorder and noone wanted to be anywhere near that guy, because sound was a record they could be held to. I see the potential in such devices, but there is a balance that has to be respected, between the public and the private.