Many of the landmark privacy-as-bodily-autonomy decisions are related to reproductive health, but there are others. McFall v. Shrimp is another important case in the area and concerns forced medical procedures rather than reproductive health: https://en.m.wikipedia.org/wiki/McFall_v._Shimp The court found in that case that an individual could not be compelled to donate bone marrow, even though it was necessary for another to live, because that would violate "the sanctity of the individual."
http://groups.csail.mit.edu/mac/classes/6.805/articles/priva...
http://groups.csail.mit.edu/mac/classes/6.805/articles/priva...
Assume Amazon will lose your data. Assume everyone else (facebook, twitter, g+, flickr) will lose your data, give them up -- or that they are already public.
Assume someone will correlate all that data, and sell it as a black market service to allow anyone to track you, see if you're in or out of your house, assume your government will put you on a no fly list if you're buying books on military tactics, left/right wing political opinion, assume your government will become oppressive in 15 years and mark up all your kids for "special attention" based on your shopping habits today etc etc...
See also:
"The Right to Privacy by Louis Dembitz Brandeis and Samuel D. Warren" http://www.gutenberg.org/files/37368/37368-h/37368-h.htm
"THE RIGHT TO PRIVACY." by Warren and Brandeis -- originally published in 1891(!):
http://www.gutenberg.org/files/37368/37368-h/37368-h.htm
Very well written, and illuminating to this day.