Harder to do with a car unless you forgot your keys and someone playing a joke on you had an amplifier near your car.
With Tesla you have a backup, in that you can unlock the car with your phone, as long as both the car and the phone have a signal. Of course this fellow locked his phone in the car too....
Anyway, what happens there is you usually lock all doors before closing them. Then when you close them, if the key is inside, oops.
This is mitigated in slightly moderner cars by the fact that driver-side doors don't lock when they're open.
So I guess we had this beautiful period of the last 15 or 20 years where we locked our cars by pressing a button on the key. Makes it impossible to lock your keys into the car.
I wonder if we're going to decide that was better than keyless before keyless becomes widespread.
If keyless ignition does make it big in the motorcycle world, I would expect that motorcycle manufacturers would add lights/beeping/ignition cutoff if you got too far from the key.