Consider the Yellowstone Bison human shield campaign which protected bison undertaking their normal seasonal migration pattern which took some out of the Park. Arising from a mythical fear of bison brucellosis being spread to local range cattle (never has a single case ever been reported, anywhere) kills of Bison were allowed by the state of Montana. A human shield campaign brought visibility to the situation, lots of publicity, as well as intervening successfully for the short term, and moving more progressive treatment of the situation by all parties forward.