It's worth noting that security/safety and convenience are almost always in opposition. There are probably cultural trends as to where different groups make th

It's worth noting that security/safety and convenience are almost always in opposition. There are probably cultural trends as to where different groups make the trade-off (I've never dug into it), but the principle is the same everywhere. You could put all of your money and attention into guarding your stuff, if you so chose, and guarantee that the work required to defeat your security was far greater than any potential benefit. Never take your car out of its concrete bunker. Or you can ignore security in favor of convenience -- always leave your car key in the ignition, and thus never be locked out accidentally, never fumble to find your keys in a large bag, never drop your keys in a snowbank.... But obviously most people try to fall just on the side of "safe enough that no one will steal my car", depending on how high they perceive that risk. For a car keypad entry -- if trying all of the possible combinations would take 20 minutes, that's probably not any less secure than driving a slightly older car with a fairly-easily pickable lock, and in return you will never accidentally lock your keys in the car again. I don't think I'd go for the keypad lock on a new car, but I have locked my keys in my car twice in my life, and it's really annoying. One of those times there was a three-year-old in a carseat, inside the locked car... fortunately it was the loaner, sitting in the parking lot at the mechanics (where my normal car was being repaired). The first time it happened I was driving an old car, and I was at the grocery store... so I went back in, bought a screwdriver & coathanger, and broke into my own car in about a minute. In that security context, having a keypad would have been convenient without adding anything to the security risk whatsoever....