Over at Raster Web Pete talks about how he doesn't get viruses very often and says it might be because his friends use good software. I'd have to add that if he gives suggestions, education, and training to family and friends, that also probably helps. I have friends and family who use crappy software, but by teaching them common sense things (i.e. don't open attachments with extensions such as .vb or .exe) you can make them better netizens.