The above mentioned vulnerability only applies to very few models, on the North American market, which have the (very costly) extra of keyless entry.

According to my knowledge, keyless entry is even illegal in Germany. (But I am not a lawyer, so I do not know if that applies at all, or if the legal situation just ends up stating that drunk people owning a car with keyless entry may not be close enough to their car that the immobilizer is deactivated)