I was in a 1v1 in a Custom Arena with friend ranger and he used Taunt, in response I used traited Portal (to give me Resistance), this turned his nameplate yellow (same as neutral mobs in PvE), this continued after Taunt had worn off but he was no longer a viable target as far as the game was concerned (I couldn’t retarget or “take target” as he was called target).
Just thought I’d let you know before more Taunt and Resist is added to the game.