Matt Drudge and Michael Arrington found themselves this week in an unpleasant position when visitors to their respective Drudge Report and TechCrunch sites were targeted by malware that appeared to have come from ads.

While Drudge vehemently denied it and blamed accusers with playing politics, Arrington acknowledged on Thursday that there had been malware-laden ads on TechCrunch on Wednesday. It's unclear which ad network served up the malware and what type of malware it was, althoug...