Lets analysize the problem a moment.
Those who who have invaded schools, churchs, shopping malls or wherever are classicly mentally ill...known fact...
Those who who have invaded schools, churchs, shopping malls or wherever obtained their guns from other than licensed gun dealers...
Basically, Obammy's Executive Orders will disarm the general citizenry...the good guys...
The only people left who have the automatic weaponry will be the criminal element, military and police...Oh, yes, and those who are able to obtain guns on the street...
The wingnuts of the world will still be invading schools, churchs, shopping malls or wherever...