Speaking slower does not help a stupid question, but I'll answer it anyway. I doubt you could find a single gun law or regulation that I would support. Must I now give you my NRA number, or have we settled that?
Some are missing your point which you took a while in this thread to get to....Too many GA pilots take their certificate for granted and do not maintain the level of proficiency required to handle emergencies or fly in high traffic/highly congested airspace.
As a private pilot with my own aircraft, I train extensively well beyond what my annual flight check requires. Currently I have a little over 2200 hours in my flight log so I speak from experience.
In my flying time, I experienced 3 serious in-flight emergencies due to equipment failure. All three times my wife and children were on board. Hence, I take my responsibility seriously.
If you were to propose better training and checks for GA pilots who fly in high density areas that may be a way to go but this incident is fairly isolated and is probably a bit of a knee jerk response in the absence of a ongoing problem. This would also be as foolish as proposing restricting the airspace.
A small plane crash generally is similar to a car wreck as far as damage is concerned and fatalities are usually restricted to those on board. Spectacular looking at times but as compared to the auto-wrecks that occurred in NYC today rather tame as to the extent of injuries and fatalities.