13
option 3) simply rename name/email to name - that way users would not be confused into entering an email address which screws the format and also opens them to spam.
I would say this is the quickest and most painless option.
they can enter an email address is the post if they wish for replies.
the ideal option would be to add a new field for email and keep it in the database, perhaps contact via a web form so it is not visible to the web.
Another option is to add an optional password field to the post form and they could then be registering at the same time? Name/Username, Email and password?
Andrew