This post had some discussion about this FAQ. Per this thread by
Current version:
How do I disable commenting in my journal?
To disable commenting in your journal, go to http://www.livejournal.com/editinfo.bml and uncheck the option labeled "Enable message boards," which is found near the bottom of the page, then click "Save Changes".
You also have the option to disable comments on individual entries, while leaving commenting enabled for the rest of your journal. Using the web client, you can do this from the full version of the Update Journal page at http://www.livejournal.com/update.bml?mode=full. While posting or editing the entry, check the box marked "Disallow Comments" to disable comments on that entry only. If you are disabling comments on an entry that already has comments, these comments will then become invisible.
Many clients available for download include the ability to disable commenting on individual entries. For more information on your preferred client, consult its documentation or its menu options. See http://www.livejournal.com/support/faqbrowse.bml?faqid=158 for information on downloading a client.
If you would like to block comments from a particular person, but still receive comments from others, see http://www.livejournal.com/support/faqbrowse.bml?faqid=20.
If you would like to keep comments enabled, but want to stop receiving notification emails, see http://www.livejournal.com/support/faqbrowse.bml?faqid=62.
My proposal:
Proposed title:
How do I disable or re-enable commenting in my journal?
Proposed text:
To disable commenting in your journal, go to http://www.livejournal.com/editinfo.bml and uncheck the option labeled "Enable message boards," which is found near the bottom of the page, then click "Save Changes." Any existing comments on your journal entries will become invisible while your message boards are disabled, and new entries will not have comment links.
To re-enable commenting in your journal, go to the above link, check the option labeled "Enable message boards," then click "Save Changes." Any comments previously made will reappear if message boards are re-enabled, and all previous entries will then have links to leave comments (except entries specifically marked as "Disallow Comments," see below).
You also have the option to disable comments on individual entries, while leaving commenting enabled for the rest of your journal. Using the web client, you can do this from the full version of the Update Journal page at http://www.livejournal.com/update.bml?mode=full. While posting or editing the entry, check the box marked "Disallow Comments" to disable comments on that entry only.
Many clients available for download include the ability to disable commenting on individual entries. For more information on your preferred client, consult its documentation or its menu options. See http://www.livejournal.com/support/faqbrowse.bml?faqid=158 for information on downloading a client.
Individual entries marked as "Disallow Comments," through the web interface or a client will never allow comments, regardless of whether or not you have message boards enabled.
If you would like to block comments from a particular person, but still receive comments from others, see http://www.livejournal.com/support/faqbrowse.bml?faqid=20.
If you would like to keep comments enabled, but want to stop receiving notification emails, see http://www.livejournal.com/support/faqbrowse.bml?faqid=62.
Feedback is encouraged -- I know it's not perfect...