Possible to issue a warning before plugin deletion (i.e., that tables will be deleted)?

When a user decides to uninstall a plugin in WordPress, it’s up to the plugin author to define what actions should be taken during the uninstallation process. This can be achieved by setting up a callback function for the uninstall hook (or providing an ‘uninstall.php’ file within the plugin’s directory):

register_uninstall_hook( __FILE__, 'my_plugin_uninstall_callback' );

function my_plugin_uninstall_callback() {
    // Code to remove associated database tables or perform cleanup tasks
}

Contrary to the common assumption, it’s the responsibility of the plugin author to ensure a smooth uninstallation experience. This typically involves writing code to clean up any created database tables or data stored in standard tables.

Moreover, plugin authors can enhance user control and experience by integrating settings within the plugin’s options. By providing users with the ability to specify the fate of their data post-uninstallation directly from the plugin’s settings, authors can empower users and ensure a seamless experience. Additionally, actions such as:

do_action( 'pre_uninstall_plugin', $plugin, $uninstallable_plugins );

can be leveraged within the plugin’s code to accommodate user preferences and further enhance flexibility and usability.