what is the "overpenetration myth" you are talking about? It would seem that overpenetration would be a bad thing in a self defense scenario. I would think that if a bullet from your gun went through an offender and injured someone else, you could be held responsible for it.
Hundreds of years from now, it will not matter what my bank account was, the sort of house I lived in, or the kind of car I drove... But the world may be different because I did something so bafflingly crazy that my ruins become a tourist attraction.