I'd like to open my WP based blog to the general public so they can contribute, so I'm trying to lock-down my WP install.
In particular I would like them to be unable to:
edit the slug or assign tags
add custom fields
add an excerpt
see the Tools section
see the Comments section
What's the best way to go about these customizations? Should I roll my own theme or is there some plugin out there that can suit me?