Original Commentary
Brisbane had a distant relationship with his parents. Sofia has a distant relationship with pretty much everyone.

Modern Commentary
I don't think we ever said who told Brisbane and Sofia's parents about the theatre closing, but I don't recall anybody asking after this. By process of elimination, I'd say Goliath. Caleb almost certainly doesn't know how to use a telephone. Peter wouldn't forget Brisbane. Kimberly seems a bit surprised by this. So, I'm going to say that Sofia actually filled out the "Emergency contacts" form. And no, their parents didn't ask any follow-up questions regarding their son who also lives at the same theatre. - Terrence