I agree that privacy is a major concern with users. Face it, the "computer age" is not a fad. Information about yourself is stored electronically in zillions of places.
One very simple "fix" to help preserve alittle bit of your privacy online is to rent a mailbox from Mailboxes, etc. or someplace like that. Then change the billing address on your credit cards (all your bills actually) to this address. UPS will deliver to this address whilst they won't deliver to a PO Box. All your credit hrecords and history points to this "static address" no matter where you live or move to. You can also get one of those ONEBOX.com voice mail phone numbers as your phone number.
Then you can order some of that "Miracle Weight Loss" cream and apply ten times the amount suggested until you become invisible.....:)
Sometimes its better not to do something (even if it's super cool) just because you can do it....
KISS...Keep It Simple Stupid.