Bianca hovered where she was, unsure if she should move further. "I'm sorry," she said quietly. "I had...no idea it would be that bad." She hesitated at Lavender's question. "It may not mean they come true. I don't know what it means. But you're right. It's bad."
But at least they knew it was bad. How could they not know it would be bad? Harry Potter was dead, murdered by some unknown, people were being plagued by terrible nightmares, and there had to be something going on. Problem was, despite knowing something was happening, they had no idea exactly what.
Worse Bianca wasn't sure there was any way to stop it.