I forgt, I had already determined the plugin won't suit my need unless there's a way to remove the option for authors to create new tags, and only have the option to select from given tags.
I want to use the media tags as a way for users to put images into given "categories", but not have access to the all the file gallery options on the post screen, just want the tagging option in the regular media uploader attachment editor.
My user set up is super simple, each user gets one post, it's preloaded with [gallery] in a custom field. There's no visual or html editor, just an inline media uploader. Users just add a title, upload images and publish. They still have access to the image attachment editor so I thought it would be great if they could optionally put each gallery image in a general "category", like "landscape, portriat, botanical" ect. (it's for an art group)
Thanks anyway, otherwise an awesome plugin that I'll still probably explore in other projects.