Airport is turned on my default and I think that is totally unsafe. I didn't use a strong password when I first got my Mac, and that part is my fault. But what is to keep someone from accessing my computer wirelessly through Airport when it was turned on and I had that weak password? And even if a person didn't want to access my computer, if their computer was infected with malware or whatever, what would keep an automated program from guessing the password and connecting to my computer or anyone else's? This worries me, and I'm surprised Apple or any company would have wireless on by default.