[Mailman-Users] password questions

[Eric P. Forgette]

I have created a new list and added members using the add_members
script.  I did send not notification to any members.  I now need to
enable the new members to unsubscribe if they wish.  These users will
not have web access. 

How can I create a list which doesn't require a password for users to
unsubscribe themselves?
or
Is it possible to set a default password when using add_members to 'mass
add' addresses to a list?
or
Is there a better way to do this?

Thanks,
-Eric