As to "properly labeled" and responsibly done.
Yeah, that never works for long. Perhaps at one point someone properly labeled. Then it got sold. And someone (like most people do) thought, I want to breed this. Or sell it. Might sell easier if not told exactly what it is.
With some species you can quickly muddy up the gene pool or locality.
I'm with Craig on that one, it seems to me people do it because "they can". A regular blood or ball doesn't make much money, but call it a angry ball, whoa, bunch more $$$.