I have noticed for a long time people who don't have kids of their own tend to be 110% against "spanking"...I think it is an interesting subject.
I'm against it because I was hit as a kid (with multiple implements and in more than one area) and I remember how it felt...I've also seen multiple kids get whacked in my presence by trashy "mothers" and I feel their pain and fear. I don't think children should have to go through that.