Macs are excellent about making it difficult to run and install things, accidentally or otherwise. If someone can't listen to simple instructions about not "upd

Macs are excellent about making it difficult to run and install things, accidentally or otherwise. If someone can't listen to simple instructions about not "updating Flash" or not installing a "PDF plugin", anti-virus isn't going to stop them. In cases like that, it's better to focus on the problem, not the symptom. To pick some nits, viruses are self-replicating. There are no viruses on Macs (yet). There are tons of Trojans. It's a big and important difference, but we obviously can't count on sensationalistic media to care about the difference. The more technical people here on HN, though, should know and care.