Hello,
While I was browsing the Customer Service forums on the main World of Warcraft, I came across this post (WoW Forums -> Blizzard, how can we deal with this griefer?).
It looks like you can get a trinket from a quest in Winterspring called the Crystal of Zin Malor (Crystal of Zin-Malor - Thottbot: World of Warcraft).
It seems people are using this to AFK in Alterac Valley.
I seached for Crystal of Zin Malor and nothing came back. Just thought I'd share this with all of you, although you may already know about it.