We require you to have an account for a number of features on Change This. Frequently we want to make sure the people on the other end of the tubes are real people. To do this we ask you to sign up and verify your account with a real e-mail address.
This helps us cut down on automated submissions of comments and proposals. It also makes sure we can contact you if we need to. We will very infrequently do this but it can happen if we need to ask you questions about a proposal or talk to you about comments you have posted.