In my history, the discomfort over security clearances seemed to come from my being viewed as a sissy, and weak, willing to let others take the risks, than a real threat. However, I do recall being asked at a TS interview in the early summer of 1972 at the Washington Navy Yard (at NAVCOSSACT), "Has anyone ever tried to blackmail you?" The answer was no. Yet even my own father constantly warned me that this could happen. It never did.
Update: Sept. 19: I have since learned from the Piers Morgan show that Virginia's gun laws would only delve into my past if I had been involuntarily committed, so, no, there would not be a problem if I wanted a weapon at home.