As an owner of a (warmish) performance car with keyless entry & start, this infuriates me. It's all about convenience for the consumer & security can take a back seat. Yes it is easier to leave the keys in your pocket, but is it really worth the inconvenience of having your car stolen? I think not.
If I leave my vehicle without fitting my Disklock, it feels like I may as way have left the keys in the ignition.