It was only 1 ad in there that was causing the problems.. there was a script in the "Increase your Sexual performance" ad that used the DHTML addon to open other Ads with a different referer address in it.. So someone had an ad, that they had paid to be displayed, that was also making them money by opening multiple other sites that were more then likely paying them..
Neat trick, and I'm sure it's against google's TOS...
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GLASS PIPES