Have had plenty of strange experiences with GF and Ops before, so I figured it's time I make my first post here.
Queue for GF, get an Athiss. It's me, a Lvl 24 Sorc, a Lvl 23 Op Healer, a Lvl 22 Sniper DPS, and a 19 Assassin Tank. We zone in, say hello, tank says nothing. No big. We get down, wait for Tank to pull. Sniper DPS pulls instead, and continues to do so for the first 3 pulls. At this point I wonder what's going on and ask the Sniper to stop pulling ahead of the Tank. Sniper replies with "if her wasn't so damn timid i would stop". Sadly, the Sniper has a valid point.
Sniper and I alternate pulling until we get to Prof. Leyshara, who goes down no problem. Tank needs on the Aim gear that drops. Sniper calls him out, tank says nothing. Next we sneak around a few adds to the Beast of Vodal Kressh. After a brief discussion about the validity of the Cave/Pond method, we pull. The "tank", as predicted, fails utterly, leaving me to tank the beast in the arch. Beast goes down, we all loot, the tank released so no ninja for him this time.
We get down to the part with the Champion Sith Disciples and suddenly our tank decides to be a tank and pulls! Except he pulls entire rooms, leaving me to try and CC some before everyone dies. At this point our Sniper has had enough and starts a votekick. I happily oblige and pull out my Khem to tank the rest. The last boss goes smoothly; healer had sense enough to throw heals at my Khem. Looted, said thanks, parted ways.
Tl;dr- fail ninja tank who didn't pull or try to tank finally mans up at the worst time possible; kicks ensue