The long part of the bar is meant to go down and to the left between the door and the floor, to make the steering wheel harder to turn.
Everybody attaches it with the long part sticking up in the air.
Are the instructions for the Club bad, or what? I'm usually the first person to say "you don't need to propose an alternative for your criticism to be valid". I think in this case, however, where the validity of the criticism is predicated in the existence of alternatives, you really need to give one.
Maybe a sticker with ↑up↑ and ↓down↓ printed on it, in such a way that the text is upside down if the club is locked incorrectly.
That's the whole point of why it should be placed that way, but if it inconveniences the user then it will be installed wrong and be less effective.
In the Club's case, it might have helped to include a simple "This end up" label in the appropriate spot.
Not that I'm opposed to your approach either...
I suppose one thing that benefits security the most is a functional society - if people can get better and more stable employment working as a locksmith than a burglar most will apply their skills for good - there will still be some types attracted to the thrill of larceny or unable to hold a 9-5 job for whatever reason.
Then just slide the Club off