Klaus has never been one to fear signs about danger. It isn't that they will ignore people's needs for privacy, but they still have to peek in. Once they see the pillow fort, they smile a bit. Well, that seems obvious. And then there's Security.

They knock to announce their presence before settling on a pillow somewhere at the edge of the fort. Maybe if they don't make a pain of themself, they won't be in danger of the risks.