The best thing would be to make people aware that you are not supose to click "yes" to every single popup you get, thats obviously how most spyware is installed. Also everyone knows that a car needs its oil changed but nobody does the critical upgrades on the computers?
There should be something like a "license to operate a computer" , MINIMUM things that everyone should know
That would minimize DDoS attacks that are launched with computers infected with trojans and we know what those SOB do with computers that are compromised
What good is it for example to install zonealarms and then spend the first day clicking "yes" to "should program 'x' be allowed to access the internet?"