Both of my cars set the alarm off if you've not started the engine within about 30 seconds of opening the door using the key. One is a 10 year old car, the other 3 years old with keyless entry and the key only used as an emergency measure.
I'm also fairly certain that the steering lock only disengages when the transponder is checked in the older car - it takes about 2-3 seconds after turning the key before it starts up. The newer car requires the key to be placed in a key slot then the start button to be pressed, and it is only after the button is pressed that the steering lock is removed. I'm not sure about the transponder check on this car however.