I still can't believe people are discussing "hitting". It is very much more efficient to snap the little bastards necks.
Well, I think a good solid knee / fist to the face WOULD snap their necks. Snapping necks sounds very inefficient, especially considering that they're going to be at knee-height for everyone except Evan.
I think Patrick's strategy is best so far -- keeping up to speed on the perimeter picking off stragglers, mixed with sprints through the pack to break them up and delivering knees to faces. Eventually I think you start resorting to using kids as weapons though. In fact, I think this might be a good idea right of the bat.