I found an article on Wired today about clothing designer Benetton's plans to weave radio frequency ID (RFID) chips into their clothing.  The claim is that this will reduce costs for the company, and they're right.  The issue is not whether Benetton will save money, though, but instead is whether or not people will appreciate having a tracking device implanted in their clothing when they buy it.  I suggest you read the article.  I believe you'll see my point.