I think Emily was commenting less about the importance of the UNSUB's name and more on the fact they guy was a freaking moron. He spent the episode wanting to "catch the guy," not to "put a stop to his crimes," and then acted like not knowing the unsub's real name was some kind of "outsmarting" by the unsub. Fail, Fed, you earned that Emily-putdown.

Or at least that's how I saw it.

DragonLady