You should ask the monk who approved that node why (s)he thought the node was worthy of approval. Maybe that monk can convince you that it was a good idea after all. And maybe you can convince the monk that it wasn't such a good idea after all. In which case that monk may decide not to approve nodes that easily in the future.

Personally, I can't recall ever having approved a node. Regardless of my perceived XP, I don't feel comfortable deciding on what is appropriate for the Monastery (yet ;-).

You can always consider a node for deletion (if you have enough privileges), if you think it's not worthy of being in the Monastery. If enough other monks agree with you, the node will get deleted.

Liz