Yepp you are right, and to clarify; I did test the following things earlier today (before posting my last post) since I got curious.
Place remote on ground just outside the drivers door
Result: The start button went green, the dash started up but the car didn't. Warned that the remote wasn't inside the car
Started the car with the remote in the car, then I placed the remote in my house and drove away. I was out driving for about 10mins
Result: The car warned that the remote wasn't in the car, but the car didn't shut down
While out driving without the remote, I did put the car in Park-mode.
Result: Nothing happened, was just to shift back to drive again and drive away
Still out without the remote, I reversed.
Result: The display now told me to shift to Park mode when I had parked, I thought that would mean that if I shifted to Park I wouldn't be able to drive again, but there was no problem. Still just to switch back to drive and drive away
When car is on but remote outside, I stood 10meter away and pushed the lock-button on the remote.
Result: Nothing happened. (hoped I would be able to shut the car off and lock it with the remote, but nope nothing happened)
Im surprised that there isn't a lock that disable the possibility to shift gear when the car is in Park mode and the remote is outside the car. This seams like it should be there and I hope some smart guy at lexus add this feature by next software update. And a feature that locks the car when the key is more than 10meter away.
My guess is that the sensors only can sense if the remote is about 20cm away and it would be very irritating if the car locked down every time you got 20cm away from the car so that request is probably a bit harder hehe
I hope this clarify what is happening