I did find an article about a small town somewhere down south that tried to ban Am.Staffs. from herding trials. Their reasoning was that the Am. Staffs. won all the ribbons and did not give the Aussies any chances. They did not achieve this goal.
-EDIT- Am. Staffs. and German Shepherds are both considered difficult to train as herders because they both have the instinct to bite the sheep instead of nip like collies do.
My roommate says I'll die by giant turtle.