"The regional government was moved to propose the vote after being presented with a petition signed by 180,000 Catalan citizens calling for bullfighting to be banned by law. If passed next month, the law will give bulls the same protection against cruelty as other animals."
Ricky Gervais is the public figure working on this with the WSPA.
I cannot see any decent arguments for not banning bullfighting, but I am curious to hear them if they exist.
There is also a worldwide petition:
Bullfighting action - WSPA USA