Not just stenography of seditious vocalisations...
It'd also be possible to track ambulatory locomotion to a fair degree.
4 publicly visible posts • joined 4 Nov 2010
" ... which optimise the sites being viewed - there's no point in downloading colour pictures or JavaScript code to an e-book reader ..."
Incorrect. When in 3G mode, the Kindle connects via a stock-standard proxy (fints-g7g.amazon.com, so that Amazon can authenticate devices using Whispernet). Absolutely no server-side optimization is preformed - Javascript works fine in the browser and full color images are transmitted (if not displayed). Furthermore, the Kindle completely bypasses the Amazon proxy and connects directly when in WiFi mode.