Why not fight back (Score 1)

With more and more overt intrusion into the realm of personal privacy, why not address the issue with congress. A simple solution would be to allocate a range of ports (say 50000-59999) that are available for vendors to obtain feedback. Make all other ports require explicit user notification prior to passing on information. Then, if you don't wish to have a vendor obtain information anonymously you can block ports 50000-59999.