Has anyone disabled the factory installed anti-theft alarm? Mine is set off without thyme or reason. This shuts down the ignition and the car won't start. On top of that it's just damned annoying to have your horn blowing and waking up the neighbors. I only found one thread searching for this and it didn't sound like anyone had successfully disabled it. My mother owns a Mazda 3 and it was purchased new and did the same thing, going off for no reason.