Really? I'm rather shocked by that tbh. Is it unreasonable to suggest that they should care? (In general, if not necessarily in this specific case.)

Yes. What would you have them do? There are many times a kid, particularly a teen, would be with a non-relative. A family letting their teen bring a friend, sports trips, etc. Now, if there is a reason to be concerned (such as indicators of abuse, neglect, trauma or danger) that's a different story.

Only time a hotel cares about who a teen is sharing a room with is...if they're not sharing a room with a responsible adult of any kind. That's why I assumed that the parent would even ask to begin with. It's due to noise/liability. One hotel tried to force my parents to split up when we were teenagers. They wanted one adult per room.

But in any case, even then, they've got to catch you. Like for example if the neighbors bring it to their attention. How many hotels register each occupant? All of the ones I've stayed at only ask for the ID of the person whose name is on the reservation.

... just say "no".

i don't think sylvie's coming back folks... unless she's waiting to give us a trip report after the fact -lol!