Amazon has a patent to keep people from comparison shopping in stores
It shouldn't matter that this is an obvious thing to do or easily circumvented (for the time being).<p>It is 1) an invasion of privacy and 2) anti-competitive behavior.<p>Version 1 may be easily circumvented, but future versions could easily be tighter and more difficult to circumvent.  For example, a contract with the mobile providers could make this something that no longer depends on in store WiFi usage.<p>This is the sort of thing that should be stopped in its infancy.