As a general rule of Internet conduct, users are expected to be aware of the security policies of computers and networks which they access and to adhere to these policies. According to RFC 1281, individual users have a responsibility to use security mechanisms and procedures available to them on their network to protect their data.
Users are responsible for assisting in the protection of the systems they use.
For systems which rely upon password protection, users should select good passwords and periodically change them. Password guessing and dictionary attacks are common ways of forcing unauthorized entry to networks, and even the best passwords can eventually be defeated mathmatically, given enough time. The use of strong passwords acts as a firm deterrant against password guessing attacks, and buys additional time against dictionary attacks. Do not just capitalise the first letter, but add uppercase letters. DO use a password that contains alphanumeric characters and include punctuation, where supported by the operating system.