Many websites exist which track both private and commercial airplanes. If
you wish to opt-out of the government sending your private information to
these vendors. You must opt-out, not opt-in.
http://www.nbaa.org/ops/security/barr/
http://www.nbaa.org/ops/security/barr/new-process/
If you want to see what I mean, check out http://flightaware.com/ which
allows searches of private airplanes.
-Alan