Considering that the author likes the idea of carrying his stuff in a brown paper bag. I don't think a beat up looking laptop would bother him. In fact, if you look at the picture, there are a few scratches and dings on his laptop.

Minor scratches won't affect functionality in any way, in fact, I think there is a certain beauty to it. A laptop is a tool, a tool is meant to be used, and usage leaves marks. If it looks spotless, it is as if no work has been done on it.

In my netbook bag: charger, ac cord for the charger, hdmi cord, tiny wired mouse, laser pointer thing, pens/paper, notes, business cards, usb sticks with various linux distros (i often give these away) a kick-ass wifi dongle, ubertooth, and various usb cables. Im not having all that bouncing around in a canvas sack. This thing is small enough to qualify as a "purse" when the flight attendant tells me to check my carryon.

Couldn’t you just mod the bag or add another bag to put inside the movie prop bag? I think the whole point of it is security through obscurity. i.e. People are less likely to rob a cheap bag.