sfgate.com – excerpt
Bay Area officials are encouraging public transit commuters to adopt the Clipper card, which is accepted by every major Bay Area transit system. The cards are convenient and easy to use, so it’s not surprising that people are adopting them enthusiastically – there are more than 1 million active cards in circulation.
But those commuters may be surprised at how much their Clipper cards know about them. If you use a Clipper card, your every move on public transit can be stored for up to seven years – even after an account is closed…
This is an ongoing privacy battle with technologies ranging from Google to FasTrak. Unfortunately, the technological devices that rely on privacy invasions seem to be proliferating faster than the legal challenges against them… (more)