If this were the only way to single pull mobs in the game, I might be
supportive of the idea that its an exploit.  But with FD, Lull, Sneak
pull, Zone pull, COTH pull, Rez pull, high level pull, extreme range
pull, charm pull, and I'm sure others I'm either not thinking of, or not
even aware of, the general idea that using method X to single pull is
automatically an exploit strikes me as invalid.

So next you'd have to approach on the basis that this -specific- method
of pulling is a bug.  I'd agree with you if you were talking about zone
line pulling; zone lines are an artifact of the way they set up the
game, and for the most part make no sense within the context of the game
itself.  Why would something stop chasing you just because you crossed
an arbitrary line, say the one between WC and EC?

But I'm not so sure you'll be able to convince me pet aggro is similar.
 Faction is a concept imbedded deeply into the game; its not congruent
to any Real Life phenomenum, but works entirely on in game logic.  It
is, however, observable, and not only can you act differently towards
mob in game based on these observations, you -must- do so.

Take as an example, invisiblity.  If there's a mob you are KOS to, and
invis makes you not KOS, then you might suppose that you could pull him,
then run around the corner, cast invis, and he'd be unable to find you
any more than he could before you pulled him.  Not so.  In fact, if you
aggro him, then run out of follow range so he goes home, then wait
around for an hour before casting invis and trying to sneak past him,
he'll still be on you instantly.  Because he's more alert?  No, because
your buddy who -isn't- on the hate list can invis and walk right past
him repeatedly.

To me, if I can sneak past someone, and my buddy can sneak past someone,
then an hour later we should still both be able to sneak past him, or
neither of us.  But thats not the way things work on Norrath.

Point being, pet pull works based on faction, and we have to take things
that work on faction based on internal consistency in the game, not on
comparison to real life situations.

Lets try a different approach: unintended utility.  Well, here let me
say this.  Pet classes have been getting the shaft where it comes to
utility on raids for a long time.   Many raids, pets aren't allowed at
all, or only to high end players who have gotten specific AA to give
them the control they should always (IMO) have had all along.  Finding a
raid level situation where pets are a help rather than (or perhaps in
addition to) a hinderance is a "good thing".

So, to sum up: Its not doing something that is generally outlawed, its
not using something that is an unintended artifact of the way the game
world is represented by the program, and its not giving someone who is
already overpowered a further massive advantage.

If you can come up with some other definition of Exploit that might
explain why you think this fits that description, though, I'd be happy
to entertain the notion.

Grage, 54 Berzerk, Luclin
Splendid One, 65 Mage, Firiona Vie

I think that to be able to pet pull, you need to be high enough level so
they dont chain agro.
All the pet pull does is let you agro the mob without getting too close to
the others.
If you were out in the open, you wouldnt need it, you could just single pull
with a dd.

So no, I dont think it realy does enough to be called exploit.

I don't think it's an exploit.  

Look at it this way:  Sure, you can pet pull with a green pet; but to
balance things out, when the mob is at camp you have a green pet...