This is exactly what Jiraiya did when he taught Pein. He didn't seek permission from anybody. He just told Tsunade and Orochimaru he was staying. And he stayed. For three years.Originally Posted by samsonlonghair
Being a missing ninja isn't a big deal, by itself. This is why the declaration to the other villages that Sasuke is a missing-nin is important: it is blindingly obvious that doing it after three years is in response to his activities and their political ramifications. And honestly, considering his activities, it is MOSTLY because of the political ramifications. Naruto's fight with him was between them. A kids fight. They just happen to have super powers.