The problem is that not everyone has XP SP2 or anti-virus or anti-spyware software to protect you from this crap. Those sites in particular were often cause for telephone calls to the helpdesks I used to work at. Fact is that 91% of google.com users are Windows, but only 40% are Windows XP users! There are TONS of people who are still running Windows 95, 98, Me, with NO updates, NO protection. Think about this. How many people can only get dialup in their area and have never installed an update to their OS? TONS, I run into it regularly with my work. Companies like CompUSA, Geeks on Call, etc. that offer tech services make a killing just cleaning viruses and spyware off peoples machines because they dont keep up to date. It's a matter of stupidity sure, but not that they are being warned, they think they are using something that's OK and have no warning because they dont secure their machines. An Amiga, Mac, Linux user can be stupid like this and have less chance of virus and spyware.
Thanks,
Neofree