This is a fairly stupid argument to be perfectly honest, sure, it's entirely possible to be very very careful, and never ever get a virus, but surely then if you do cock up and get one, what do you plan on doing about it? As many have already highlighted in this thread, there are many many anti-virus programs out there at cause no trouble whatsoever, that remain inconspicuously on your computer until the day you do accidently click on that oh so tempting "You're our 1000000000th visitor and win 1 gazillion pounds" Anti-virus applications were designed to give peace of mind, so that you don't have to be vigilant at all times (Do you all suffer from paranoia so that's why you're always vigilant?
) Sure, I can see that some of you must have had issues with anti-virus programs, but that doesn't mean you shouldn't have one installed.
Say, you're a member of a SWAT team, you are faced with the choice: to wear a bulletproof vest, or to not wear a bulletproof vest? Bulletproof vest, not impregnable, but does provide an extra layer of protection in case you do go round a corner and get shot in the chest. Or you could decide to forget about the bulletproof vest, save some weight, but now you have to cautiously peer around every corner, tread very carefully, and make damn sure that the next corner you go around doesn't have any shooters. What would you choose? Is it not very obvious what the smarter decision is?