Well, first of all you need to keep an extra horsehair seat pad and seat cover on hand at all times............ Maybe a headliner too.
But seriously, I did hear a story one time about somebody that glued razor blades to their stereo radio case. According to them they came back one morning and there was blood all over the front of the car and part of a finger on the floor........
Not sure the cleanup is worth all that for a Becker.........
Ken300D