Well he obviously wanted to become a ninja, but why would the league of ninjas possibly think of recruiting him now if he can't even sneak some shuriken onboard his own plane...
...In a more serious matter, I see this as probably true, as such an incident seems to have happened on the same day he left and rumor soon spread that he was the guy involved... not likely it happened to some other private jet owner and then some Japan airport security guys decided to say it was Steve, just a bit far-fetched.
Nice work on photo too, and whole incident made me laugh.