Is Xbox Live Unhackable?

"At this point the PlayStation Plus service is a lot more appetizing than the Xbox Live service, or at least to the bystander. Early adopters of the PlayStation 4 already have plenty of free games to keep them entertained until the next big game comes out. The Xbox One, on the other hand, seems to be suffering from a drought. However, Xbox gamers don't seem to mind; they think the extra dosh is worth forking out for an unhackable service."