One of the dumbest things I've seen in a WZ was committed by me, although it wasn't totally my fault.
I was the only one standing in between a ball carrier and the end zone. Anyway I tried to buy myself sometime for my team mates to come in to help, so I tried using my knockback ability. Server lagged and although the animation played while the opponent was in front of me on my screen, he was actually behind me. So I ended up just giving him a nice boost to the end zone haha.