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But then wouldn't it be fair to say that things like Prop 2 are evidence that the social conscious is starting to disdain factory-farming-type practices like battery cages, veal crates, farrowing crates, etc?
I think to make an assertion like that, you need to be sure that the people who's social conscience is being questioned understand both the rationale of the polocies as well as the consequences of the new law (Prop 2)
Millions give money to PETA, doesn't mean Millions of people agree with PETA philosophies concerning their right to eat meat, use lab animals, save endangered wildlife (something PETA is against BTW), and keep pets! They just get all warm and fuzzy in side because they are giving money to an organization which promotes animal rights, which in their minds usually mean "Animal Wellbeing/welfare"
Perception doesn't always equate to reason - People who voted for Prop 2 may or may not have understood the issues or the consequences of the action. Like another poster said - who would vote against a law known as the Prevention of Farm Animal Cruelty Act, esp. if you didn't understand it.
EDIT: I am not saying you are wrong by the way, I do believe that public perception is changing in respect to the issues you mentioned, but I don't believe that the passing of a (this) bill is evidence of that change.
Apparently some people, like my boss, didn't get the memo on the ban of horse slaughter and animal abuse in the U.S. He's still beating that same dead horse every faculty meeting! LOL!