Here is the other side. If there is dissatisfaction on the employees part, he could downloads customer lists and copies of intellectual property. I live where Herman Miller, Steelcase, and Haworth are all located and manufacture office furniture. Security comes immediately and watches and checks personal property and escorts the employee to the door. The intellectual property he could harvest would be exceedingly valuable to the competition.
When a employee gives their notice, an employer can be a jerk and not accept the two week notice. They can and will let you go, to make it easier on them. Especially if you work in Arizona. This state is a "right to work state" and no notice has to be given by either party.