System users are usually granted specific rights with regards to their accessibility options towards the main server. This is why most systems administrators need to identify the licensed users and their rights as defined by their department heads and superiors. Granting rights to all may be a bad decision since it allows the system and the network vulnerable to any form of intrusion at any time without limiting the options of who may be behind it.
Such has been an issue that systems administrators must learn to address. It is not mainly about knowing a person but by what he is capable of doing. That is why access rights should be properly labeled as administrators, users or guests. The absence of such tags makes it hard to audit and work backwards in cases where system malfunctions and possible conflicts such as server crashes may ensue. It is best to limit the users at a minimum so that pinpointing the probable suspects can be limited.
[tags]security rights, access levels, accessibility[/tags]