How do you turn off the ratings?

I either need to turn off the ratings, eliminate the ability for a non-paying user to register or make it so that those who register are forced to pay to sign up through the Directory Listings.

Right now, a new visitor sees the rating system which tells them they must log in so they can rate the directory listing. When they click on the log in, it takes them to a registration page where they can register an entire website. I only want them to be able to sign up and PAY for a listing… not to be able to sign up for a website. Help!