I think the issue though, is that not EVERYONE who sees the "pet" and asks after taming it is always going to have good intentions. And that the fear, is that some random hunter will find out about this, or see it ingame, and then go and take advantage of it. And then everyone else could be "punished" by having Blizz find a way to once and for all fix appearance buff pets because no one bothered to make a bug report via tickets (which DOES work, I've had NUMEROUS GMs create and submit bug reports with information I've provided in tickets, in fact, every bug I've reported has had that done, so saying that's pointless is.. pointless

) or on the forums, and so Blizz figures we're taking advantage of them letting us police ourselves, so to speak, when it comes to knowing WHAT is an "okay" appearance buff, and what isn't.
Yes, it may be over reacting... But the fact is that as far as we know, no body, until Dialga, as far as anyone KNEW, or mentioned, had reported this as a game altering exploit. It seemed that everyone was relying on blizzard, or other higher ups on this forum, to find us talking about it on the forum and figure it out and deal with it themselves.
In short, just because WE are responsible in the fire's use, doesn't mean everyone will be. And while people aren't directly responsible for the actions of others, there's still something to say in regards to discretion of spreading the knowledge of game-altering exploits. It's not okay, for example, to use speed hacks, or spread information on how to get them, even if you only intend to use it to get around in SW, to speed up your bank to AH travel time, or something...
Just my 2 cents again. I'm very much a rule following in most situations, and I especially don't like the idea of promoting issues which could be direct exploitations, even if the "promoter" themselves aren't using it a bad way.