does anyone actually use . need virus barrier?
Oddly my wife works on PCs, has to because of her job, and you would be surprised at how many large companies, ship files with malware or viruses. I have now given her my MacBook Air and we use that to filter all of her mail, and I have Virus Barrier on that, it does pick up things, I cannot say how well or how actual the virus definitions are, but it works.
I used to work in Localization, many years ago, and at that time all files from Microsoft, that we localized, were not checked at source, for viruses.
You can look at it this way, you have insurance, it's there and you might need it some day, but like insurance, it guarantees nothing.
You call it Purple I call it Magenta