Use this wiki plugin, introduced in Tiki3, to display a tagline or (fortune) cookie from the Cookies feature set up by the administrator. A new cookie is displayed in italics and within double quote marks every time the page is refreshed (assuming more than one has been input into the Cookies feature).
Introduced in Tiki 3.
Go to the source code
Preferences required: wikiplugin_cookie
Would produce on this site:
"How many features are too many?"