Sounds actually fucking coolSo you see someone walking around and think to yourself: "Hey that's a nice ass transmog, i would like to have that too.".
So you go over to him, kick the poor chum's ass and loot his butt.
It happens again, but this time the butt-to-be-looted is on your own faction.
So you come up with an overly complicated plan to lure him into a free-for-all world pvp area, and as you are trying to manipulate him into springing your trap on him he whispers to you "Hey wanna duel for a chance of getting this sweet mog? Just 1k per duel.".
After swift calculations involving the fact that you have roughly half of his Ilvl you fight him a couple of times and eventually you are indeed awarded The Butt you desired.
A practical way to get old mog pieces in a less restrictive and less repetitive fashion, an additional motivator to pvp and a way to potentially bypass grinding.
Additionally it allows mogs to be shared either consensually or after a trial of skill (naturally involving 11 rogues and a boomkin, just to make it fair).
So: Yay / Nay / Butts?