extra user names

[andy]

    I recall that one of the biggest security holes in most UNIX systems 
would be
default passwords being left unchanged (or nonexistent)  for the 
various system
users (such as UUCP, and the like.) Is this something I should be 
worried about?
There are presently 16 users on my iBook, 1 being me, and the other 
fifteen
set up by the OS. Should I be concerned about these extra users-- is 
someone
able to log in via, say, smmsp?

    How does the OS derive these passwords?


    andy

    letterspackages at telus.net
    calgary, alberta, canada