With the level of might the Pure Grace Palace possessed, even if the young subordinate youths were not sensible enough at times, their adult escorts would still not possibly have permitted them to go do such a thing. Moreover, to these youths who have yet to be officially accepted into the various palaces, they would be highly fearful of giving a bad impression to their escorts even before they had set foot into the palace. If it was said that they would have the courage to commit such a deed, it would be hard to make it convincing.
Additionally, what kind of a place was the Dragon Slayers Palace? Fei Yan's power had already attracted such a great amount of attention during the Battle of Deities Grand Meet so how many people could possibly not know of her strength?