People don't seem to recognize the real reason to block fired employees' access to the computer servers. Having worked in a company that wrote computer code for large companies, I can tell you that fired employees were never given notice. The first inkling was when they arrived to work and found that their security badge did not work. Then, their badges were collected, handed their personal items and walked outside. It has nothing to do with punishing bad employees, the reason was to safeguard the code from sabotage, period. Yes, the code is that valuable.