Actually, probably not:
We managed to ferret out an "unemployed" Mel Gibson living in Cameron Park who gave $250 to the Yes side. Alas, this was probably not the star but a gay-hater of lesser means bearing the same name, as Cameron Park is a community about 25 miles outside Sacramento. Then again, you never know where the Malibu land baron might have a little pied-a-terre.
The search engine is fun, though.