Just to let you know that I am one mac user who is not ignoring this thread. I don't worry about these things so much, though, because if someone broke into my computer they would be so bored with it at the end of 5 minutes, that they'd move on. I did turn off my airport thingee, though, as I seldom use it.
I will stay with Mac for the rest of my life, as it's all I've ever used. I think I have my 4th, 5th, and 6th ones right now.