This is an addon module for
EditableSign (a free plugin). This addon adds functions to specify nominated keywords to indicate untouchable (non-editable sign). If a sign contains any of keywords listed in the Untouchable_config.yml, EditableSign won't allow you to edit the sign unless you have "editablesign.bypass.untouchable" permission node.
Installation:
Place Untouchable-x.x.x.jar file in plugin/EditableSign/addons folder, and restart your server.
Configuration:
cannot_edit_message: "&c[ES] You cannot edit this sign!"