I just came from WVW from Sorrows Furnace and noticed that 1 Kaineng Mesmer with a small group was jumping onto the wall of keeps and towers then using Mesmer port to port in other players. So much for fair play I actually gulp myself when I saw the Mesmer jump real high onto langor wall then using the Mesmer port then jumping down.
Hope Arena net is fixing this bug. Faceslaps that Kaineng Mesmer lol.