Might it perhaps make sense to scrub or obsucure email addresses from the author tags?
There was an article on slashdot mentioning a study about how spammers get the addresses. Basically scraping web pages mailto links and strings looking like email addresses seems to be the most used technology. They stated that even simple obfuscations like using HTML entities or character references will cut spam sent to these addresses drastically, while they are still fully functional as mailto links. Apparently they scan web pages as text, not HTML. Other ideas include strange looking account names containing odd but nevertheless valid characters which throw the scanners off. Unfortunately, Yahoo et al. usually wont accept them either.
More advanced JavaScript based techniques or, if the address is for information rather than a mailto link, using "j3322ptm at yahoo dot com" will be successful in cuttting down spam for some time to come, until word gets around and the spammers run out of easy prey and start using HTML parsers, JavaScript engines and advanced pattern matching.
J.Pietschmann
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