Editing User data

What '''user data''' would make [[Consumerium Services]] more useful to the [[Consumerium end user]]?  What would we like to know about them, and what would they like to reveal via the [[Consumerium protocol]], and where and how could distributed data be stored to prevent a large scale [[privacy leak]]?

Possible data we might exploit, if the user voluntarily makes it available:
*products that we know they buy despite a negative [[Consumerium buying signal]] - this would help us refine what their [[individual buying criteria]] really are
*allergy and food sensitivities for all people that the given user buys for
*nutritional or desired diet information (use [[Consumerium Services]] to help one stick to a diet?  Another way to become [[self-funding]] possibly)
*[[individual buying criteria]] specific to a product or a [[standard label]] - in other words, do they care about a label or not, will they buy from certain [[types of companies]] or not, from certain [[types of countries]] or not
*[[Faction]] loyalties or tendencies that reflect [[political choice]] and may help resolve questions of "do they care about this or not?"  This should be kept generalized to the point of a broad stereotype, to avoid violating more serious privacy.  Probably no more than a basic [[political spectrum]] can be reflected, if that, and that of course voluntarily.

[[RFID]] might make all of this quite visible to vendors, but not to consumers.