I too have felt its a bit strange to write down your name, phone number, maybe some other piece of contact info and submit it in order to say I want to retain my privacy and not have my contact details released to marketers.
How long until printouts of this list are found in a dumpster somewhere.
http://urbanlegends.about.com/od/business/a/cell_directory.h...
Cell phone numbers have been going public this month for the last 6 years. =(