One step forward....

 .... two steps back.

My car key is one of the new-fangled ones where you just have to keep it on you, and the car opens up as you approach.  Cool eh?

When I walk past the car, the car wakes up, then shuts down again as I walk past.  This happens often enough to be irritating, since the car is usually parked near the house door.   And the key is huge, as keys go, so it's awkward to keep in my pocket.    These two things combined mean that I tend to leave they key upstairs by the bed, a fact that I only remember when I look for the key as I approach the car to drive it.   So the minor inconvenience of having to press a button, or even put a key in a lock to make the car go, is replaced by the major inconvenience of having to go fetch the thing when I want to drive.

Even better, it is possible to buy quite cheaply, a device that interrogates such keys, and reproduces the response, so your car can be stolen quietly, by anyone who has such a device within a few yards from your key.  Someone outside, say, not far from the key by the bed, or not far from your table at the restaurant.   I hear that about half the car thefts in France happen this way.

You can get around this problem by putting the key in a Farady cage when not in use.   A metal box will serve (test it first).  Or, you can buy a special pocket to put the key in, that means it can't be interrogated remotely, but it also means that it doesn't open your car as you approach, unless you take the key out of its special pocket.

Do these people ever think?

The key, the Faraday cage: