Seems like so many aftermarket rear bumpers with 2" receivers say "off road use only" or the like. I'm assuming this isn't typically because the bumper isn't up to the task, but rather it's not DOT approved, etc, so more the manufacturers covering themselves from liability? I'm really interested in something like the demello rear hybrid bumper. Would I be stupid to tow light (< 3000lbs) loads using these types of bumpers instead of mounting a regular hitch?