I think the better question is: who has ever seen apparel with an NPC crest that wasn't fugly? Outside of D9 and D9-style line jackets, I don't know really think of the crest as an accessory.
One of the many things I love about Theta Phi Alpha is her beautiful coat of arms. I think for apparel it looks better flattened to single color than displayed in full silver, gold, and blue.