I will be getting my new Honda in a month. It comes with something
called "Immobilizer Theft-Deterrent System" (which is one of those
devices which cuts off the ignition and/or other vital systems if it
is tampered with). Additional options I've researched include:

1. Lojack, which in this high tech age may be easily countered by
a pro thief,
2. Window etching, which (apparently) can be easily done with a
$20 DIY kit (acid etches the VIN into your windows)
3. The Club, which is what I used on my old car.

Anything else which might be effective and/or state of the art?