YSK there's a 99.99% chance that your car has a GPS Tracker and Ignition Cut Off Switch installed without you knowing. (And no, it's not your phone or navigation package)
from /r/YouShouldKnow
YSK有99.99%的机会，你的车在你不知道的情况下安装了GPS追踪器和点火切断开关。(不，这不是你的手机或导航包）。)