How can someone without a CNetID subscribe / unsubscribe from the lists using the web interface?
Some lists are open to the public. To subscribe to a public list, see the Subscribe to an email list instructions. After you subscribe to a list, you’ll be required to enter a system-generated password, which you can change on the Lists website. See Change my Lists password for instructions on how to change your password. See Unsubscribe from an email list for instructions on how to remove yourself from a list.