I think some people are definitely lacking in the common sense department, particularly those who have a home computer to use but aren't enthusiasts. Most people I know laugh at me because I'm regularly scanning my pc for viruses, updating my definitions and setting up my firewall etc. But quite a telling statistic - only 3 of my friends have either a pc or a laptop, and of those 3 people none of them have any antivirus/firewall software. 2 of them now have the lovsan virus and are complaining about how they can't get on the net.

You can lead a horse to water.....