If the sliders are welded on - well, you can draw your own conclusions. Most are designed to be bolted on, but some folks weld them on for their own purposes. I'm not trying to suggest either way, just make your plans to suit your use. My question is, why would you hire someone to "build a cage"...
A set of rock sliders with a cat skid plate will seriously discourage this. They can still be stolen, but the thieves will have to work harder. Most of them want to cut and run quickly. No matter what you do, if someone wants it bad enough, kiss it good bye. :mad: