Originally Posted by Rob P.

IF you carry only for general self defense, then I'd say that you are very close to the edge of overreacting. Vigilance is not drawing at every little sound even if the noise isn't expected or "normal." Vigilance is being aware of your surroundings and being prepared and ready to draw and defend yourself. There is a difference. You should draw after the threat is known to exist, not just on general principles that there could be a threat.