Why can anyone rate an app? Why can't it be that you have to have used the app to be allowed to rate it, and the ratings weighed by your time in the app, your rating history, your rating history's stddev or collaborative filtering, etc?
Because there's a lot of us normal users who: 1) like to rate stuff from a different device, such as a computer, and 2) don't want using an app to necessarily and automatically constitute a permission to have all of our usage habits tracked and recorded.
