With more people using these RF cards for door access, I have to reflect how far we have come. In the olden days, the staff would just key in a 4-digit code and the door would open. And then, you find grimy keypads because no one bothers to wash thier hands. Then, someone had a bright idea of putting magnetic strips on cards and hence the "swipe" cards and credit cards were born. Now, everyone realised that the swipe cards have a high "wear and tear" factor and thus, the RFID cards were invented. OK, so I did not check the Internet for correct sequence of event but this is about right.
For every solution, there are problems. Still, these devices must be sold. They must be installed and used. Because in a nutshell, no one would hire a staff to sit on a desk, record every other staff's movements on a book and open the correct doors for them.