I don't understand how people get any scratches on any disks to be honest. Need to take care of your shit. I mean I went through 3 H2 disks, but once I realized your not supposed to move the 360 while its turned on it was ok.
I use Limewire, don't download like programs or something. That's where the majority of the viruses are. But I have McAfee so it deletes it the second I open it.