Those adventurers, who laid that trap, are scumbags, but that gambler chick had it coming. You just don't start to dance on a freeway. It's dangerous and her antics could have gotten them all killed. (Maybe in the long run it actually will.) Maybe I would be a bad group leader, but I would have considered to leave her on that floor and instead would have informed the guild about the circumstances. If she makes it out there on her own, fine. Well, I would have considered it. Maybe (after informing the guild) I would have tried to look out for her on level 2, but with the strong option to withdraw.