I have lived in several locations over the past 5 years and I want to
nullify all of my old mailing addresses.  I want to insure that credit
card applications and the like are not being sent to these old mailing
addresses.  Also, at my current address, I somehow got placed on a
pornography mailing list.  I want to make it so that I am removed from
this list and any other possible pornographic mailing lists.  How can
I accomplish these tasks without writing to each individual company to
request they take me off their list?