What does it mean to do Good?

For you internet technologists out there, the recent news regarding Justice Department Hiring & Promotion Practices raises an age-old question: If what you create is used for bad, Evil things, what will you do about it?

If Google's motto is, "Don't Be Evil" and they know that their search engine or other Internet tools are being used by the Dept of Justice, or the current Administration, to do something illegal, or maybe even Evil, what should they do?

What would you do?