Auto-logoff facility in Unix

[ado at elsie.UUCP]

	Our version of the Bourne shell will timeout the user if he (sic)
	doesn't respond to a PS1 prompt within a specified amount of time.  The
	environment variable TIMEOUT contains the allowed time in minutes.
	Obviously this is not user-proof and in fact setting TIMEOUT=0 will
	disable the feature.  The intention is to terminate the shell on an
	"abandoned" terminal, like when a fellow (sic)
	goes home for the day and forgot to log out first.

Would requiring users to type in their passwords (rather than logging them out)
be preferable in a set-up like this?
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