This part caught my eye though.
"Would Arizona and other states that are more conservative than San Francisco retaliate and stop sending conventions to San Francisco?" asked Kevin Westly of the Golden Gate Restaurant Association. "Certainly in a recession, we don't want any retaliation."
I think there could be something to this. I say people who agree with the Arizona law show their support by going to Arizona when possible. People who book conventions, book them there. Go there for a vacation.
More importantly, boycott the San Franciscos.