Hmmm. Are pitbulls dangerous though? Or more correctly easier in comparison to other breeds to train to be so, by irresponsible owners?
The plan incidentally reminds me of the Dangerous Dogs Act. This was a law passed in England a few years back. Might've been 1994 (this is all from memory). It was in response to some attacks by dogs on people - the politicians then acted. So it stipulated certain dogs were no longer allowed. Which meant rottweilers, pitbull terriers, tozers (sp?), etc had to be put down. What happened, was that nationwide vets ('veterinarians'

) refused to do this, as they didn't want to put down healthy animals that were also loved family pets.
As the law was then unenforceable it (though it was already passed and had become law) was defeated and had to be repealed and the people could then keep their dogs.