Regarding the data policies, I was configuring the Mollom plugin today and noticed an option called Privacy Policy Link. This is the text for that option: Displays a link to the recommended privacy policy on mollom.com on all protected forms. When disabling this option, you are required to inform visitors about data privacy through other means, as stated in the terms of service. I think this solves the problem and is similar to using Akismet with a personal data policy at least alerting visitors of the types of data transmitted.