This is like so much else where government keeps wanting to make new laws... there are ALREADY laws about the misuse of emergency services... if they can't catch the criminals and stop them now, how is making another law going to stop them?
I would love to hear one of these swatting calls. I would be willing to bet that anyone with a minimal education could easily figure out this was a prank. I think government needs to look into the people that are authorizing the sending of swat teams. They seem to me as much to blame as the person pulling the prank.