Une loi américaine intitulée Controlling the Assault of Non-Solicited Pornography and Marketing Act, CAN-SPAM, de 2003 adopte la méthode d'exclusion et elle a échoué, selon tous les témoignages.
A bill in the U.S. entitled Controlling the Assault of Non-Solicited Pornography and Marketing Act, CAN-SPAM, of 2003 adopts the opt-out approach and, by all accounts, has failed.