I am running an installation of WordPress MU and am writing a plugin that decides whether to show ads or not based on a value stored in that blogs database. function global_adsense($the_content) { global $blog_id; if(get_blog_option($blog_id, 'ads_removed') != "1") { $the_content .= '<!--ADS-->'; remove_filter('the_content', 'global_adsense'); // only for the first post } return $the_content; } PHP: The option 'ads_removed' is added on blog creation through the add_blog_option function. The ads are never displayed however :S Does anyone see a problem with the coding that I am missing?