Is it too obvious to point out that none of the mass shooters of which I am aware committed the murders within 3 days of purchasing the gun?
Also, when someone's brain goes dysfunctional to the point that killing a room full of innocent people seems like their best option, does anyone really believe that waiting 3 days is going to change their minds?
The problem here is the people committing the atrocity. The people. Not the chosen object.
Imagine, if the nut who shot Gabby Giffords had chosen a suicide vest instead of a handgun. How many would be dead? What if the Aurora shooter had decided to use nerve gas or other poison? How many would be dead?
What is 3 days going to help?
Still happily answering to the call-sign Peetza.
The problem, as you so eloquently put it, is choice.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.