Why would you need someone's email? I could see it being optional if you want to recover an account or make it private secured with a login. You could offer j

Why would you need someone's email? I could see it being optional if you want to recover an account or make it private secured with a login. You could offer just a unique url option. One for updates and one for viewing. No login needed but with a correspondingly low level of security. Then it can also become anonymous as well.