True, it can and will happen to stock pins too. Thus the reason for Marlin's 25mm kit. But like it was stated on the first page, what material was used to make the pin. If its a stock design with less then stock quality material, all the extra studs in the world wont do you any good. I dont remember who said it, but they are right, we are reaching the limits of the Toyota design.
Something I've noticed about the steering arms, is if you use ARP studs, and dont over torque them and the steering arms have the correct taper to match the cone washers, and you keep them tight. Then you will never need 6 studs. I know TG sells them, but remember it was Marlin design.