This little plugin is in homage to my geek friends who love to hate Lord Vader.
No, it is only visible to those who have access to see the wp-admin areas of the site.
Just like the original Hello, Dolly plugin there is not an options panel. Perhaps in a later version, but not right now.
Yes, the quotes are wrapped in the tag, #darth. I'd suggest changing the CSS in your theme's CSS as opposed to the plugins hello_darth.php file.
Sure. Direct any suggestions, problems, or smart remarks to @mclanecreative on Twitter
Sure, add your comments/suggestions about this plugin here: https://wordpress.org/support/plugin/hello-darth