At OJR, a fairly exhaustive piece on the history and status of weblog comment spam, including this zinger from Irish blogger Antoin O Lachtnain, laying down the gauntlet (though I doubt it had any effect):
Relevant comments are very welcome, whether you agree or disagree with what I have to say. However, advertising of goods or services is not permitted on this forum without payment of a fee. The fee per advertisement is 500 Euros, which is payable immediately by bank draft. If you post an ad but do not pay the charge immediately you have corrupted data on this Web site without my permission. As such, you are guilty of criminal damage under the Criminal Damage Act, 1991 and subject to a prison sentence of up to 10 years and a fine of up to 12,700 Euros…Please note that posting on this forum will have no effect whatsoever on the PageRank of any links that you post.