Other possible privacy problems (Score 1)

On the same lines, a user's complete travel plans can also be reconstructed, as a user browses from motels and inns during his halts, using a notebook for example. Ofcourse there is P3P(Platform for Privacy Preferences) to control such kind of usage. But rarely do people use it. For those interested in knowing more: http://www.csee.umbc.edu/~kolari1/iswc/iswc/ might be of interest. It details a possible direction to privacy protection, by letting users share knowledge about websites and their privacy reputation.