It's a little over-the-top to make something into a law, at least IMO. And how would you enforce that? "Sir, can I sniff your chest please?" I usually either don't wear a frag or go very lightly when traveling on a plane (then again, I may rethink this considering the BO and people-stink that overtakes a plane on a cross-country flight - I'd rather smell AdG, or even Kouros, than that).
Around animals, I have never noticed a "problem," not sure where that's coming from. Sure they sense more smells than we do, but that also means we always have a scent, even if we don't try (e.g., laundry detergent, fabric softener, deodorant, would all be very noticeable by animals). I think this is all another example/more proof of the theory that scent is frowned upon in our culture, as being inferior or more base/animalic than the other, "nobler" senses.