LOL, some people....
Just how many people would click an ad saying "[a href="vny!://didierstevens.wordpress.com/2007/05/07/is-your-pc-virus-free-get-it-infected-here/"]Is your PC virus-free? Get it infected here![/a]"? According to the security researcher who ran that very ad on Google for 6 months, 0.16% (409 of 259,723) would click on it. 98% of those people were running Windows. The Google Adwords campaign cost $23 in total, which works out to $0.06 per infection had the site actually been malicious.