Everything about bulk email, emailing, mass email etc.

PIN Number Reversal

PIN NUMBER REVERSAL (GOOD TO KNOW) if you should ever be forced by a
robber to withdraw money from an ATM machine, you can notify the police
by entering your Pin # in reverse. For example if your pin number is 1234
then you would put in 4321. The ATM recognizes that your pin number is
backwards from the ATM card you placed in the machine. The machine will
still give you the money you requested, but unknown to the robber, the
police will be immediately dispatched to help you. This information was
recently broadcast on FOX TV and it states that it is seldom used
because people don’t know it exists. Please pass this along to everyone
possible.

What are some ways one can do to avoid receiving unsolicited bulk U.S. mail (not e-mail)? Is there a govermental organization I can contact or CC my requests to be taken off different mailing lists?