You should add this question to your set of questions: "Do you really want to report all your users up to Google, so that Google sees how successful your produc

You should add this question to your set of questions: "Do you really want to report all your users up to Google, so that Google sees how successful your product is and can build a competing product?" And yeah, doesn't work for all sorts of things, but as a site operator I would be careful in giving away that information out of self interest already ...