If you wish to cancel your account or unsubscribe from LiveJournal, you must delete your journal.
Second: I'd like to suggest that FAQ16 link to a couple of related FAQs, perhaps as additional subheadings in the list at the bottom:
Former users who have deleted their journals occasionally open Support requests complaining that their entries are still visible. This is because they have been cached by search engines:
Search engine results: Please note that deleting your journal will not delete any content that may have been indexed and cached by third-party search engines.
And, maybe people who want to delete for privacy reasons would be open to deleting or protecting specific entries instead, if the option were presented to them?
Delete or protect individual entries: Instead of deleting your journal, you may prefer to delete individual entries, or change their security setting.
While I'm at it, let's link FAQ 50 in the FAQs about deleting entries and changing entry security:
Add to FAQ 126:
Please note that any entry that was previously posted with a Public security setting may have been indexed and cached by third-party search engines, and may appear in search results even if the entry has since been deleted from LiveJournal.
Add to FAQ120:
Please note that any entry that was previously posted with a Public security setting may have been indexed and cached by third-party search engines, and may appear in search results even if the entry security has since been changed to Friends-Only, Custom or Private.