The Security Mentor

Apple is running TV ads that show a virus-infected PC next to a problem-free Mac user. This is bad.

I don't mean they're jinxing it. The problem is that they're raising their profile and taunting the creators of malicious software. If you're in a biker bar, would you mind your own business, or would you bellow "NOBODY IN THIS JOINT CAN LAY A FINGER ON ME!"?

Here's a post on the Emergent Chaos blog that makes the same point more vividly:
How Apple is asking for it