>>Viper0+U2
There are ways to filter content without breaking user privacy. For example, you could restrict access to the Internet altogether, and suggest that your users only get what they need from your internal corporate network. See how incredibly productive that makes your staff?
What these "enterprise environments" want is to leech off the Internet's knowledge while keeping a firm chokehold on the privacy of their own employees Sadly, it looks like Google is caving in to their pressure.