Many people realize that privacy is a rare commodity on the Web.
But not that many may have thought about the issues that might follow them away from their computers. Consider the location-finding technology being built into the latest generation of cell phones. One likely result is a message on your cell-phone display screen offering a discount on a large pizza if you buy from the pizza parlor you are walking by. While some hungry people might welcome such instant offers, others will at least want a choice about whether to get such ads. And just about everybody probably would be uncomfortable with the idea of marketers compiling data on one's movements around the city or nation.