Well, your car at least would be the dream of any robber. Now seriously, most probably the car starts itself because of the aftermarket remote starter or alarm do not work properly. Another variant would be that the car manufacturer, or the previous owner did not give you the remote control, to stop those when plugging in the battery. If you acquire them back, then you can easily turn off those options. Only after that you will be able to plug back the battery. I think this is the solution to your problem. Just take back the remote control and you will repair everything. Goodbye.
