Yeah, if you send a high sneak person off to do that, they can keep killing. Youll sometimes see the dice roll over their head and "stayed hidden" appear if they are looking. Otherwise, if youre at max distance and shooting through some LOS blocking terrain, youll just wipe out an encounter. Its a hard one to mix for rogues assassinating sentries and nothing happening and automatically entering combat. I feel their pain from a design standpoint because if you shoot someone and then ink cloud or slip into darkness before they have time to start searching...yeah youre hidden. But, you can just live on that edge and murder everyone. Larger / smarter patrol behavior from them and giving them a hefty bonus to perception after theyve been alerted might help
