Now that's a fancy spare lock and makes mine seem inadequate now, am running a cable through the wheel and swingout bracket with a combination padlock... Man, you have a serious meth head problem in your area!
I would think the sliders by themselves would be enough to deter any scumbag with a cordless saw? They look for easy/quick targets where they have less chance of getting caught or shot.
(I would be more afraid of someone stealing the whole truck.)