Actually, Inoda has stated that the 'exchange' of his powers is that his fighting power just gets shitter and shitter the more they evolve, right? Like, I'm pretty sure it was stated, and Kirito even pointing out that Inoda's stats are still extremely bad. I wouldn't be surprised if the 'tradeoff' of his ability is that if he actually tried to HARM anyone or anything his stealth would immediately drop, so yeah, I doubt he can go assassin's creed killing at all XD (He totally could steal shit, though, if only because Fujino made the Canon ethics code that prevents these things in Canon SAO a joke in his NTR-verse)