Conventional wisdom says that adult/porn sites are more likely to contain malware of various kinds than other sites, so much so that from what I have heard antimalware testers will run through a list of known bad sites to see what malware gets picked up and what gets blocked by the applications under test. Evidently there must be some truth to this conventional wisdom. My optician was telling me that his nephew came to visit for a couple of weeks and would stay up at night playing computer games. After he left his uncle noticed that the computer was running dead slow, and had to take it to a repair facility. It turns out this loser had been visiting child pornography sites in Germany and had picked up an extraordinary amount of malware. Apparently the computer had little in the way of security installed. This does raise the question in my mind of why such sites should have this problem. Clearly it is not in their best interests from a business perspective to install malware on their own, or to fail to make a reasonable effort to keep their sites malware free. I could envision a righteous person perhaps trying to bring the site down by attempting to install malware on these sites, but that seems unlikely. The obvious alternative is nut cases, but why target adult sites if you are trying to spread your malware? Surely the traffic on them does not begin to match that of many more reputable sites, but maybe the latter have better protection against malware. Any thoughts?