If you start a game with Janusk Advice unchecked does he still appear? I don't have the game in front of me, but I thought there was an option for him somewhere in the game.
How does that work for MP? Does everyone have their own Janusk?
So I wonder if there's some option you set in your campaign xml that would keep him away.
Maybe there's some event that could be created at the start of the game that could just kill him off and display a random death message (for humor).
"You hear a faint grunt, as if someone was punched in the chest, but you see nothing."