Cool Viagra vs. Cialis Spam

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Spammers are always looking for ways to get their message past anti-spam filters, and HTML manipulations are part of their regular bag of tricks, but this one just looked so cool I wanted to share it with you. At first glance, it looks like the spammer simply wrote “Viagra vs. Cialis” vertically (that in itself is a known HTML trick):

But if you look a little more closely, or simply highlight the text in the spam message as I did below, you will see that each letter in the pharmaceutical is actually the first letter of a word, forming a kind of a spam poem:

How did the spammers select those particular words? (there are dozens of different versions, each with similarly innocuous words like “vanished,” “intervals,” “light,” “steps,” etc.). Well, I am willing to bet that they specifically selected words that are strong “Bayesian Poison,” i.e. words that typically appear in legitimate correspondence, and score well on Bayesian tests, confusing those types of content-based filters.

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