Writing a Securing Script - What features would you add?

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http://ubuntuforums.org – I'm writing a script to secure Ubuntu and am looking for suggestions. I plan to release it under the GPL and don't plan to spend much time on it other than updating it from time to time based on what I consider to be Ubuntu's flaws. If you have suggestions, please make them along with the reason your suggested what you did. I will be releasing the script in another thread once a fair number of suggestions have been made that don't jeopardize usability too much. Currently it does the following: uninstalls the shopping lens (as it is spyware by definition because it sends search results to canon (Hardware)