Let's say there's 3 people, you don't know if they're innocents or traitors. Say Player 1 dies, no one knows who kills him. Player 2 says, "Did someone say Player 3 killed Player 1?", when nobody says that; just to try to get player 3 killed. Player 3 gets killed by random innocent. Is this toxic gameplay? A false kos loophole? What if Player 2 continues doing this to people? ie; "ITS PLAYER 3" Or, "I think Player 3 killed Random Innocent"
None of these are valid KOSes. Also, it could be considered toxic game play if done intentionally and in excess.
The player who kills player 3 will be slain because that isn't a real kos and it will be considered toxic if the player keeps it up with those kinds of things.