Turn off Sitewide Tags on special blogs
If you want to turn off the post copy in the Sitewide tags plugin on a special site/blog, you can do it with a one line plugin as follows:
remove_action('save_post', 'sitewide_tags_post', 10, 2);
Install the plugin in the plugins folder and activate the blogs/sites you don’t want the SWT plugin to copy posts to the tags blog. In other words, it excludes those blogs from showing up.