You could shoot the bird if it's not a protected species. I would use a pellet gun which isn't illegal to shoot in town. Wait till the hawk is on the ground or somewhere that doesn't have anything behind it.
Yes... but you have to use Ricky Martin, Miley Cyrus, New Kids on the Block, Shakira, and Robin Thicke CD's. And throw in some of those Justin Boober, Baaber or Beiber CD's as well. Hawks hate their music.