Plagin for stop words?

Hi there! I have a little trouble. In one blog I'm using wp-robot 2.11. It is grabbing dvd stuff from amazon. Last couple weeks it start grabbing to much stuff with Charlie Rose movies...In different categories...Is there some stop-words plugin for WP? I mean i put there some words , and if article contain this word, or title contain this word it will never post this article??
really need this. thx!

any ideas? (((((

1. learn php for 20 minutes.
2. upgrade that plugin yourself.
3. make more tools for your personal use
4.????????
5.PROFIT!

Nice) I hope that this plugin already exist...

what fear91 said