Thanks to Messrs Twitter & Co, I've just seen this article in The New York Times about people using electronic gadgets to break into locked cars.

http://mobile.nytimes.com/2015/04/16/sty...rrer=&_r=0

Since American writers never use 300 words when 1,000 will do, I'll try to summarise:

* The only keys that are affected (in this story) are the newer ones where the key just has to be a couple of feet away from the car. You don't even have to press a button.

* There is a signal from the car which tries to 'look for' the key. If the key is about 2 feet away, the doors unlock.

* These gadgets amplify the signal from the car so that it can 'find' the key even if it's 50 feet away, inside your house.

* Voila - the car 'finds' the key and unlocks itself.

Solution? (Are you ready for this?) Keep the key in the freezer which acts as a 'Faraday cage', preventing the signal from finding the key.