In the end and most of the time, I usually decide against squishing my car in that parking spot, instead opting for one that is probably a whole lot further away from the place I am trying to get to.
There are no points for effort here. If you step out of your car and see that your tires are on the freaking lines, get back in and try again! If I don't see another incorrect parker for the rest of my life, I would be a happy man.