Hell hath no fury...
Samsonlonghair's crazy theory #17113:
Maybe Konoha's society is a bit different as far as parental relationships are concerned. Maybe kids move out of their parents' homes when they enter ninja academy. For instance, we never see Sakura's parents. We know from episode three that she's not an orphan. We've seen her room, but never her parents.
We learned early on that Ninjas are the military power for their country. It doesn't make sense for the military to live with their parents when G.I. quarters are available. The only one we know for a fact to live with his parents is Shikamaru. He may be the exception and not the rule.