steering column anti-theft locks/jackets

[drillingmachine]

I know that all types of anti-theft devices can be defeated, except for ravelco, but how well do these work? I have one that covers the whole left side where the signal light switch is, but it doesn't cover the area from the ignition key switch to the hazard lights. Do I need to weld a piece of plate in between the ignition and hazard switch too? I have never known the mechanics of breaking the column and starting it up.