Yes, all the time. My area isn't safe enough to keep the door unlocked.
Oh, I have a cat that saves my life that way. Any deer walk past, any funny noises, any suspicious looking clouds and he comes in and sprays the front door so the danger can't get us.They have saved my life from many blowing leaves, rabbits and crows just this week alone.
I lock my door before I go to bed. Not only do I refuse to be a prisoner in my own home, but I have dogs and guns. Besides, I would know long before anyone got to my house, unless they were walking up. In which case, they wouldn't get much if they had to carry it out. Even if they walked up, my dogs would let me know before they got too close.
They have saved my life from many blowing leaves, rabbits and crows just this week alone.