Visual indications for Draft posts

[ZoltanVeres]

@cramforce
This issue is really should be discussion. Before i start working on something specific, i wanted to ask your opinion about it:
On #101 you mentioned that it would be nice to have some sort of visual indication for the draft post on the page.
I do know that the template has a different favicon displayed, when the site is served in devmode, which is rather helpful.
Now that we have basically 3 types of posts (draft, scheduled, published), wonder what would you consider and ideal UI indication for draft and schedule post?
There's two places where we can have visual indication:

1. The post itself
2. The collection of posts, which is displayed in the main index page

I was thinking to create a shortcode, which prepends [draft] (for draft posts) or [2029-06-06] (for scheduled posts) before the title of the collection, both on the page and both on the main index page.
What do you think? Does this even worth doing?

[cramforce]

I think that would be helpful!