We need something else, we need an "extreme" (~$1) fine that anyone can claim from any sender who bothered them, no questions asked. Spammers will stop instantly overnight. This would work for phone spam as well.
I read about an idea for an incentive/check system like that before. Something like: make the cost 10c instead of 1c, but implement a system where recipients can mark mails as confirmed "wanted" mail, upon which the sender would be reimbursed 9c. Increasing the cost for unsolicited mails while keeping the cost low for well-behaved newsletters.
