Isn't that also what "hashcash" is all about? http://www.hashcash.org/ http://www.hashcash.org/ http://drupal.org/project/hashcash http://drupal.org/project/h

Isn't that also what "hashcash" is all about? http://www.hashcash.org/ http://www.hashcash.org/ http://drupal.org/project/hashcash http://drupal.org/project/hashcash http://wordpress.org/extend/plugins/wp-hashcash/ http://wordpress.org/extend/plugins/wp-hashcash/