Story

You're advocating a [borrowed from an old email spam tempate]:

(X) technical (X) legislative ( ) market-based ( ) vigilante

approach to fighting data sharing. Your idea will not work. Here is why it won't work. (One or more of the following may apply to your particular idea, and it may have other flaws which used to vary from state to state before a bad federal law was passed.)

(X) Scammers can easily use it to harvest personal data
(X) Existing DBs would be affected
( ) No one will be able to find the guy or collect the money
(X) It is defenseless against the unethical
( ) Users will not put up with it
(X) Microsoft will not put up with it until they've made it their own
( ) The police will not put up with it
(X) Requires too much cooperation
(X) Requires immediate total cooperation from everybody at once
( ) Many users cannot afford to lose business or alienate potential employers
( ) Scammers don't care about invalid addresses in their lists
( ) Anyone could anonymously destroy anyone else's career or business

Specifically, your plan fails to account for

( ) Laws expressly prohibiting it
(X) Lack of centrally controlling authority
(X) DBs in foreign countries
(X) Ease of searching
(X) Asshats
(X) Jurisdictional problems
( ) Unpopularity of weird new taxes
( ) Public reluctance to accept weird new forms of money
(X) Huge existing software investment
(X) Susceptibility of protocols
( ) Willingness of users to install OS patches
(X) Extreme profitability of unencrypted data
(X) Joe jobs and/or identity theft
(X) Technically illiterate politicians
(X) Extreme stupidity on the part of people who do business with scammers
(X) Dishonesty on the part of scammers themselves
( ) Bandwidth costs that are unaffected by client filtering