admin features: HTML switch/moderate messages

Suggested admin features:

1. a switch to disallow all HTML tags
2. a section that shows all the previous shoutbox messages

Is there any current way to filter out all HTML? I can't seem to change anything with Drupal input formats that can affect Shoutbox. I currently use tinyMCE for much of my text area inputs. Maybe there's a "simple" line of code that I can add that will strip all HTML from the input?

Thanks.