Don’t force commentators to fill in their email addresses
Every WordPress website where I posted a comment required filling an email address into the comment form. I really don’t know why it is necessary since ownership of the email address cannot be verified. Nobody can prevent people from using fictive addresses, so there really isn’t a point in requiring them in the commenting process.
I myself sometive use fictive addresses because I don’t want to receive spam or just don’t want website owners to know my identity. It is kinda annoying to fill in email addresses over and over again. 
If you are a WP webmaster, please disable the option “Comment author must fill out name and email” in Settings (Settings → Discussion → Other comment settings). People who will want to reveal their real email address will do that anyway and the others just won’t have to make up a non-existent one.
Good point. Better, set the email field to hidden and a plugin to auto-reject comments with an email address. It would probably end spam. Hmmm! Time to code a plugin.
Let me know when you release it.