Post without registration & email validation
Have option to suggestion vote without validating the email address. Users need to just enter the name/email to post suggestions. We will either send the welcome email with password or he can reset for the password when he wants to login next time. This is very important as no one is willing to spend time in creating account. This can be an option to enable from the backend.
PS: Anonymous voting will not help in notifying the users with progress. It should be like fast checkout in modern shopping carts without registration.