Either horde or Ally in AV there is a leader, and in AV there is a prick. As you know when you pull Drek or Van in AV he screams some stuff out. When you toss a frost trap or explosive trap underneath your opposing factions leader and feign death he will spam for about 30 seconds, a lot. Another thing as a hunter or rogue you can misdirect to another player.
Somtimes when u toss a trap the boss doesnt spam for some reason.
To make sure the target you misdirect to dies, misdirect to a player checking the map, you can tell when they open their map when their avatar opens up a scroll thing.
Get reported afk by a ton of people, attack the boss, the debuff will vanish.