At the big shows like Chevell-abration, I'm usually going to bed around the same time some of the early-birds are getting up.
I do disconnect the "hot" wire to the computer at the fuse block (used to run the coil wire to the same place when I had an HEI) if I'm somewhere that I feel nervous about it... still might not stop them, but they're less likely to stick around and diagnose the problem.
The professional thief is tough to stop though.
