You can choose specific preferences of spam you do and don't want, or simply click NO to all. Might cut spam down a little. The battle against email spam is just as winnable. If a million people used this tool, spam would be controlled in two months. The only sources left carrying it would be a group of spam-based ISPs who can be blocked by your service provider and blocked in your own email program.
Spammers have the right to send spam.
They do not have the right of delivery by forgery and ruse. Forgery and ruse can be stopped despite the willingness of those who design Internet email to accommodate spammers. For more steps against spammers you and Internet Service Providers can take.