Dan Bernstein's "qsecretary"
Long overdue on updates. Happened across this page today, which contains the FGA (Frequently Given Answers) for FAQ about qsecretary. qsecretary is a mailing list filter app which requires a response for every message posted. Apparently, by replying to the qsecretary response, you are entering into a contract that *this message* is not spam, with some agreed-upon penalties if you lie. What really caught my attention was the use of the term "Half-Baked Ideas Brigade". Apparently this refers to people who glance at the problem and suggest a solution (such as whitelists or autoresponders to qsecretary) which just don't work so well, or eliminate the benefits of having qsecretary.