Keyless entry fobs result in rash of vehicle thefts

In Toronto, Los Angeles, Long Beach, New York, Springfield, and more cities, police have reported a spike in thefts from Toyota and Lexus SUVs, Priuses, and more vehicles, all parked in owners' driveways with no signs of damage. As more people buy cars with these no-push key fobs, what's the solution to stopping this type of break-in? "Use a microwave" or wrap your keys in aluminum foil. The heavy metal cages block the signal. It's another case of convenience becoming a two-edged sword.
There is no way for a radio signal to be limited to any specific range. The typical working distance is based on the common antenna configuration(s). Using a highly directional (high gain) antenna, you can reach a signal from many times further away than it was ever designed for. For example, how many people are stealing distant neighbor's WiFi, thanks to a Pringles cantenna, or similar?