I am fully supportive of ways to extract the financial incentives out of spam. The money is what drives spammers, and if you take the reward out of the equation, the spam should stop. People are trying to do this, but some of the measures are going to get them in trouble. Vigilant action may satisfy individual desires for contribution to the fight, but I hope people think about the consequences while they are at it.
When a new technology hits the streets, the early adopters grab hold. It takes months if not years for it to spread to the mainstream. World changing technologies such as the telephone followed that path, and email is no different. The first email message was sent while I was still in diapers (circa early 70’s, unless I am sorely mistaken), and it didn’t take off outside the world of academia until the 90’s. The threats followed.
Why should the newest communications technologies be any different?