Use Security preferences to control whether other people can post or reply to messages and documents on your wall:
Tap Who can post top-level messages... to specify whether other people (your followers) can post messages on your wall.
Tap Who can reply to messages... to specify whether other people (your followers) can reply to messages or annotate documents on your wall.
Scripting on this page enhances content navigation, but does not change the content in any way.