As a hunter, I follow a few simple rules when raiding and/or instancing. You can try explaining these to this guy but I get the feeling he is convinced he is doing what he should and won't use strategic tips. Much like "melee" hunters who think they can tank as good as a warrior. Yeah ok...
Anyways here are a fe wthings you can use to help teach him if you think it will do any good...
First thing I do is find out who the main tank and off tank (if we have one) are. I ask them if they want growl, dash, dive etc ahead of time. Most won't since it pulls aggro. I keep the pet on passive, so he doesn't run off, if he gets aggro he won't fight back unless I tell him and doesn't wander, etc.
I ask if they want freeze or frost traps. A good hunter always keeps these up and uses them often. I ask if they want me to feign death pull or provide dps only. When the tank pulls, I usually drop a slowing trap right at his "pull spot" or in the fight zone in case we get adds. This allows the mage to sheep, druid to sleep, offtank to pick up the add, or me to feign if necessary. And even on a single pull, it helps the tank to gain aggro by slowing the movement down so he can build threat.
I use KLH threat meter and drop feign every time I start to move up the threat rank. A smart hunter shouldn't ever really be topping the threat list anyways. We are not a toe to toe melee class and just can't survive a concentrated beating with mail, regardless of how good it is. I used to think hunters could until we went for Hakkar the first time and he took interest in me. PvE soloing is great for convincing a hunter that they can tank jsut like a warrior..../sarcasm. It usually only takes one serious beating in a raid to change your thinking.
If the hunter still will not listen, it's probably best to be blunt with him. Tell him straight up "we have tried to help you and teach you to work with us as a team but you are not making things easier. Until you can learn to work with the team and listen to people when they need things, we need to not group with you. It's jsut not workign out".
On a side note, in regards to loot, my guild uses the following strategy that tends to work really well.
We do greed greens, pass on BoP/blues and use a master looter. Rep items are distributed in order of the group (i.e. corrupted scourgestones, everyone rolls. Winner each time passes til all have the stone, then we repeat). This tends to avoid the greedy "needing" ninja tools. If you use this idea and he still does the need thing, warn him once what the rules are and give him a chance to get his head and *** wired together. If he does it again, either boot him or let him die on the next pull then boot him and get a hunter who listens.
Just my 2 cents...