And none of this is important
unless the miscreant gains physical access to your PC. And if he gets physical access, it's game over anyway.
Well, thank you for yet another method to cause chaos if some goon gets to my keyboard. I'm thrilled to know that there is yet another way he can trouble. Apart, obviously, from just ripping out the hard disk and chucking it into an external reader under a different platform allowing him to read everything.
I'll file this under Hollywood Apocalypse Scenario #4622.