I was aware of the very problem, not only for reader. Take a look at
links and you will find yourself stunned:
http://www.eff.org/deeplinks/2010/01...-guide-privacy
www.eff.org/deeplinks/2009/12/e-book-privacy
Seems that device is not safe, whatever you try. Turning wifi off might
be the first step. The problem is that it is networked gadget at the heart.
Without it you loose easy part. Books could be added via usb cable and
read as usual. Other opinions?