I used this set up to for logging users out of Joomla and return them to the home page.

1. I installed Sourcer plug-in to run some PHP. Just a great plug-in to use any ways.
2. I create a link in the main menu and set it to registered, so once the login in it shows.
3. Create an article called “logout” and add the following code to that page.

{source}

<?php

$mainframe =JFactory::getApplication(); $mainframe->logout();

$allDone=&JFactory::getApplication();

$allDone->redirect(‘/’);

?>
{/source}

I hope this helps someone else out there…