Due to an open initiative in California, all campaign contributions are publicly disclosed. Obviously, with the unpopularity of proposition 8, some business owners and individuals are receiving scorn from prop 8 detractors now that their names are out there for all to see.
A judge has recently upheld the law, which I consider to be a good one. Everyone should know where the money is coming from in any political contest, be it a ballot initiative or a presidential election.
There are many wealthy Californians who are on the wrong side of history on this issue. It is analogous to finding out a business or individual fought against civil rights legislation in the 60s, or voted for George Wallace.
And if I knew that a business had greatly contributed to Prop 8 fundraising, you can bet I'd boycott them.