Yes. Why? You did something client side to change something in the game, the same as people did to glitch their heavy ammo in the Crucible. Now if he was kneeling because you did something specific in the raid ( like grenade spam at the right moment ) I'd say no. Broken raid is broken. But you're doing something on your end to mess with the game on it's end, every game I've ever played bans people for that.