Vinegar CONTAINS acetic acid - along with a host of other chemicals. Most of those chemicals are probably harmless and will break down into other harmless chemicals. But acetic acid is not particularly harmless. The reason vinegaroons use it so effectively for defense is that it is powerfully irritating to moist membranes - and book lungs would qualify as moist membranes. While the liquid you obtain by mixing water and vinegar contains dilute acetic acid, that liquid does not aerosolize along with the acetic acid. The acetic acid that aerosolizes is pretty pure - there's just less of it than there would be if you used straight vinegar or more concentrated acetic acid solution.Vinegar is basically a watered down version of acetic acid. Acetic acid occurs naturally in nature, even being produced by animals such as vinegaroons. When it enters an environment it gets broken down, and since vinegar is already diluted acetic acid
I might use it to clean cages or objects that go in cages when no animals were present, but I would avoid using it in any place where there were live animals, especially in a cage where the vapors would be contained around the animal. And if I used it to clean a cage, I'd definitely wait until all acetic acid vapors had thoroughly dissipated before I place an animal in that cage.