We've been struggling to get the kid to close the door when she is in the bathroom. It doesn't matter if she is using the facilities, having a bath or just changing - she refuses to shut the door.
Which I guess is okay since the cats don't like doors to be closed. If a door is completely closed they will scratch and scream at the door until you open it. If it is not latched closed they will open it. If you continue to try and shut the door they will continue to scratch or push it open.
Perhaps the kid is smarter than the rest of us? Since she never shuts the door she doesn't have to worry about the wrath of the cats. Although, they do try and avoid her most of the time.