It's an interesting idea. Which could also be accomplished similarly by...
a) Typing with the computer/laptop off.
b) Graffitiing with the Palm off.
c) Typing with the computer on, but somewhere where it will never save (try cat > /dev/null on a *nix box for fun!)
I'll have to try it sometime.
And on the institution note, I agree. It's better to be sent to an institution for something really flashy.