A simple protection to this that would reduce the impact significantly would be to add an accelerometer to the keyfobs, preventing unlocking if the keyfob hasn't moved recently.
“Keyless locking systems have to provide equal security [to] normal keys.”
But what is equal? Any valet can easily copy a normal key; someone with a photograph of your key can likely do so as well. Both of those are harder to do with proximity based RF systems.
Pretty silly not having to put a physical key in before starting a care alone driving it. It only needs to be pushed into a slot with electrical connections to interrogate the key.
