Blocking people on FaceTime.

Hi,

I have recently for a new iPad 3 after dropping and breaking my iPod Touch 4. When I was using my iPod Touch 4th Gen, the only problem I had was this stranger that constantly called me via FaceTime. After getting my new iPad 3, I am yet again receiving calls on FaceTime from a person whom I do not know. My suggestion is, a option in FaceTime where you can type in a person's email and they will be blocked from FaceTiming you - there's no downsides to this addition.

You're thoughts/ideas on this?