Due to the new mechanics on how badges and emblems is awarded, you're now awarded a Badge of Justice for killing Vazruden in Ramparts rather than looting the chest. The exploit is very easy. Once you have killed Vazruden and have been awarded your 250 rep and a badge, run out of the instance. When you re-enter the instance, both the watchers and Vazruden will respawn letting you kill them as many times as you please for additional badges and rep.
I realize this isn't all that effective anymore, but if you feel like farming some badges for your old-school set or your alt, then this is a pretty easy way to get around it.