Knifing is DOD:S would be so much easier if the footsteps weren't as load, and there was a way to silence them, for example in CSS you press shift or crouch. Crouch in DODS still makes a noise.
I used to be into knifing, but it seemed like every time i was a centimeter from my victim they would turn around and shoot me. I now opt to shoot people in the back of the face.