The Electronic Frontier Foundation has a very good little report on locational privacy, “the ability of an individual to move in public space with the expectation that under normal circumstances their location will not be systematically and secretly recorded for later use.”
As usual for EFF, it is written in clear, understandable language and is free-to-access and download.
* I’m going to be away up to the mountains for a couple of days, so there won’t be any more posts here until Sunday at the earliest… next week is a slow one here in Japan as it is O-bon, the Buddhist festival of the dead, and many people go back to their family home and offices are generally closed for some or all of the week. I won’t be doing much in the way of interviewing, but I still have quite a few interviews and visits from the last two weeks to write up.
ubisurv 
Thank you for the post. I skimmed the report. Very informative.