Swear I just had this player just now but as a tank.
Never seen a shadow tank stand so far doing so little other than spam pebbles.
I'm guilty! At least in 1.7. I used to do this on my Sin tank and stand at range. Keeping threat on everything versus anyone, from afar, not even swinging my lightsaber just because I can >_< And when i feel lazy haha. I would even slowly turn with my arrow keys spamming wither and discharge in a GF BT just because Sin AoE threat was too strong.