[Onkel Neal]

Well, he would not actually be attacked. In this case, WW A would pm me his night action: I am a WEREWOLF and I attack Bob.

I see Bob is WW B, so I reply to WW A: As you size up your target and prepare to leap, you see Bob shudder, groan, and fall writhing to the floor. Before your eyes, he transforms into a beast and roars. You do not attack.

So, in this action, WW A gains an advantage in the game, which offsets his inability to make a kill that night.