My plan for about ten years now has been to take away all firearms and replace them with Nerf products, with the sole catch being that you can legally shoot anybody at any time with one. I figure the attraction to firearms is the notion of being theoretically able to shoot people with them, so let's take out the deadliness of them and replace them with the freedom to freely use them at will. Presidential debates would certainly become much more entertaining.
The difference being that if that had happened -- if some adviser whispered in his ear that we were attacked -- Obama would have hoisted that marshmallow cannon onto his shoulder bazooka-style, marched straight to Afghanistan, and shot Osama bin Laden in his motherfucking marshmallow head.