I have a question.
Have you always been able to do this? Or was it a change that was made to fix a problem with pets?
If you've always been able to do this, I don't think it needs changed honestly. why change something that's been around for 11 years?
No... you could not always do this.
There was a time when you could gate peoples pets out and if you dispelled the gate in time... the tamer would never know where they went. - that was changed as well so pets no longer will go through random gates.
There was a time when you had to actually watch your pet... and if it died, it was gone. - that was changed as well because people cried about the risks of losing all their hard work on a pet.
There was a time when you had to actually go out and consistantly tame pets because they would die often. - that was changed as well because people would rather have a cool colored pet rather than a profession of buying/selling pets to other players... or at the very least, making it so that only the rarest ones actually sell.
This feature is abused on both ends of the spectrum (in PvP and PvM) and we even have crystal balls of pet summoning! Why oh why would you even need this feature with those items?
People even abuse this feature to bring pets to places crystal balls of summoning won't allow you to... "you cannot summon that creature" message is there... but if you log out/in... *poof* here come's your pet.
The feature is constantly abused and it needs to be removed.