2bot_or_not_2bot writes "Spam: The Phenomenon is a detailed analysis of spam: products, scams, viruses, obfuscation methods, etc. Failed, and doomed-to-fail, methods of blocking spam are described. A general solution is proposed that does not: invade privacy, perform wide censorship or blacklisting, or involve payment and cooperation with corporations (beyond the transport and storage of data)." Hmmm.
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