BrakeLok - What's the point

I am pretty sure you have come across great design that are not practical at all. I just came across one that may qualify if it was a great design. It surely fit the not practical part. The BrakeLok is a device similar to The Club except that you put it on the hand brake. I wonder if the designer has actually tried to see if this product actually works or not. I don't know of any car that will actually be immobilized by not releasing the hand brake. Do you?