Fuckbook review: Offensive materila

I am continually getting emails from this "###book" site telling me I have a free account because I have signed on to their site. THIS IS NOT TRUE! and I find it very offensive. I have tried to 'block' these emails and used the yahoo filtering system to no avail. PLEASE do something about it for me. It is a disgusting thing to see these everytime I open my mail.
[protected]@yahoo.com