It's sad. But closer to home (very close to home) I know of a chain of spring fed lakes that has had perch, smallmouth bass and pike intentionally introduced into a natural Brook Trout lake because the locals couldn't catch the Brook Trout. Suffice to say, the Brook Trout have suffered huge.
Even more disturbing is these fools have now introduced the three species into an upper Saugeen watershed that was once home to natural self sustaining Brook Trout.