Hi judge09,
I honestly don't know if a Jeep engine would actually start and power the vehicle down the street as some sort of "Robo-Jeep." But, from a personnel safety perspective, the engine starting question is irrelevant. The Jeep would not have to start to become a hazard to life and limb.
Judge09, please consider the implications of this scenario: If a Jeep were left in 1st-gear or reverse gear, the Jeep could travel some distance with the starter motor acting as the engine. Given the tremendous gear reductions involved -- and you cannot trust a SWB Jeep parking brake, especially if the Jeep were left in reverse gear -- you have a slow, yet powerful and potential rogue elephant Jeep on your hands.
When the remote starter unit on my wife's Honda Civic is activated, the starter motor will crank the engine for something like 8 to 10 seconds while waiting to receive the "engine started" signal. If that "engine started" signal is not received, the remote starting process shuts-down.
Imagine that or an equivalent remote starter activated in a Jeep which was left in gear. During that 8 to 10-second cranking cycle, a starter motor powered Jeep could travel for some distance.
Bad mojo!
A bit far-fetched? To be sure, but that is the kind of "worst-case" thinking required to PREVENT accidents.
Regards,
Gadget