WordPress 2.7 Plugin Uninstall Methods: A tutorial from Jacob Santos on the WordPress 2.7 Plugin Uninstall functionality and how to use it to make the uninstall process easy and seamless. Jacob adds a note to all plugin authors that I believe is worth mentioning: Special care then should be taken when using this method to ensure that your plugin isn’t doing anything it shouldn’t when uninstalling. In other words, please be careful and do not break other plugins and/or the core.