Use a Kensington lock on your laptop?

[AeroSquid]

http://www.putfile.com/media.php?n=kensington623

try this yourself and see if you can do it. reminds me of the Kryptonite locks defeated by a pen.

[Saulbadguy]

Seems like quite a bit of trouble to open it up.

[unlurking]

I have a set of these, which don't require me to carry toilet paper rolls and will open real locks.