No, it's not. A location name isn't a spoiler, for crying out loud. Talking about the stuff that happens in the cutscenes before and after said dungeon, on the other hand, would be spoiler territory.

I don't particularly care for people saying stuff like "need 1 dps in prog for the level 67 dungeon". What the hell is that? Just say the dungeon you mean so I know exactly what it is I'm queueing for.