ok, i wanna comfirm it, you mean

1. Put latop in the car boot is safe , as long as no one see it, or put in boot before you reach mall or destination
2. Puting laptop in car boot can avoid from detector device
3. leaving laptop in back seat is safe, as long as it's not visible

correct me if i'm wrong

OK, so it's not safe to leave laptop in the car , have to always bring along the laptop with you. But it's still not safe, now days thief steal/rob your bag without care what's inside your bag even in crowd place.

BTW, what's the solution for those who MUST leave laptop in the car?