One thing I'd like to point out is, hackers are still in BGs.
The other day I knocked a priest (a stromborn player), off the side of Blood Elf Tower in EoTS, she used float but was off in the distance falling, a few seconds later, I saw a marked target hovering back to the tower, back on near the tower.
Apparently they can still fly or do something because knocked back and falling down doesn't cause a player to fly up from the depths below, back on the surface, mind you she was knocked back far, with float pushing her back further.