Assuming Intimidate is the skill around, it would see like it was a blanket effect since the character was patrolling the hallways. I would agree that such a thing would be a oneshot otherwise it would be OP and prevent all night actions from occurring.

The adult who got up and walk around might be the the witch since it seemed like they were about to do something then didn't.

The person in the shadows sounds an awful like "Stealth", while the girl in the room, I will leave that to those familiar with this game!

Also, I did a quick wikia search and like some of these characters LOOK like kids but are like +1000 years old. :/

So it would seem that Intimidate didn't prevent ALL abilities from happening but did prevent the nightkill!