I'm fairly sure that most zones actually have "development moogles" that allow access to all kinds of things, purely for the sake of testing purposes. Normally these of course should be invisible and inoperable to the playerbase at large, and in fact they really shouldn't even be spawned outside of the testing server.. But it's entirely possible something is borked somewhere that's allowing people to occasionally see (and even use) these moogles. I suspect it's nothing to be concerned about, because if it ever became a widespread issue it would certainly be fixed nigh on immediately.