Can a stranger set off your car alarm?

Yes, a stranger can set off your car alarm, especially if they accidentally trigger the sensors or if the alarm system is sensitive to movements or vibrations. Some alarms can be activated by loud noises or disturbances nearby. Additionally, if the alarm system has a remote key fob, someone could potentially access it if they have the right tools or knowledge. However, most modern alarms have safeguards to minimize false alarms.