They actually recommend shutting the engine off while coasting downhill, how many people are going to try this and lock the steering wheel?
That is the beauty of it, we never HEAR from the people who locked the wheel...
And if you never hear about something, it's not a problem, right?
Cause the dead don't complain.
Check out the belly pans people have put under the cars. Some are not too bad, others use window screen as a formwork and spray it with rubberized undercoating or trowl it with roofing tar to make it smooth and solid, (and air-tight) covering up the exhaust system of course, and put it all up with sheetrock screws into the sheetmetal of the car body. Rust? what's that? A fire? under my car? Say it ain't so.
That will be something to check for when buying a used car in future.. sheetrock screws thru the rocker panels and the floor. And wiring that is cut up and hidden with electrical tape.