Paranoia is a bitch in and of itself. If you're that afraid, you may as well just go to the whole 9's and send the package off to USCO. I back up all of my stuff daily with date/time stamp and mirror it to my iDisk, whose server logs would be able to validate my date stamps, I hope. And if you're posting onto a message board for a critique, your date/time will be posted there as well.
I wouldn't be too worried now, it seems like everyone is too busy writing their own dreck to try and steal yours
