Oh Lord...

I have a suggestion for all those folks not of a tank class or spec: if you want the tank to tank trivial trash mobs in a certain order, at certain coordinates, at a certain time, and in a certain manner, and you are not one of my guild's raid leaders...please exit out to the character screen, select your character, hit the "Delete" button, and type "DELETE" into the confirmation box.  Then, go create a warrior on another server and learn to tank things yourself.

I have been in some boneheaded PuGs before, but I usually get through them.  I have witnessed healers deliberately pulling mobs, hunters backing into pats, mages and warlocks going all out on a target when it's still halfway across the room from me, melee trying and failing to be tanks themselves, and pets gone wild pulling bosses when no one has any mana.  Not even me, har har.  

But this last Heroic A-N PuG I did really took the cake.  First, the DPS is unconvinced I can tank this.  I politely point out my gear consists of a mix of H Naxx pieces and even two pieces from the heroic in question.  They remain unconvinced.  I mark the spellcaster for shackling, not because we really need it but because I'm in a PuG and I usually use the first couple pulls to see how competent my DPS is.  I pull.  Immediately the shadow priest goes BERZERK.  He starts screaming in all caps how I'm not targeting the right mob first, and I don't know what I'm doing, I have to pull the mob back 1 foot or it's all wrong, and when he (predictably) dies, he and his guildie start screaming in all caps that it's a wipe.

Now, Bel and I have been on heroic PuGs where the DPS has died halfway through a boss, and we've still taken the sucker down.  Beating down the pull before the first boss room of H A-N with one lousy spriest down is not exactly frightening to me.  I'm sufficiently geared where even my lousy tank DPS is enough to get us by on such pulls.

Needless to say, with the two of them losing their heads, screaming about me being an idiot for not pulling the mobs 1 foot further back (and even when I pulled them back, they kept screaming that I was doing it wrong), they managed to wipe us.

I had a client once who was so goshdarn nitpicky that she would dictate where things went down to the individual pixels.  She once told me that the whole project was ruined unless the flame effect on a graphic was moved seven pixels to the left.  Nevermind that the 7 pixels amounted to maybe 1/4 millimeter.

I understand the virtue of being detail-oriented--when it matters.  Good tanks are hard to come by, and every one of them will tank heroic trash slightly differently.  Especially those who have gone toe-to-toe with much bigger, scarier things.  Sure, if you want to take down trash mob X first instead of Y, go ahead and let me know, in lower case letters, calmly, and before the pull--I'm accommodating.  But don't abuse your poor tanks by being a "seven pixels to the left" kind of micro-manager.