Among the thousands of out-of-state checks that flooded into California in support of Prop. 8 last fall was one for $9,999, from Plano, Texas. This contribution to the anti-gay-marriage cause came from Alan Stock, CEO of Cinemark, which owns two national movie theater chains. In coming weeks, Stock will likely be earning a lot more than 10 grand from gay men and their supporters. Among Mr. Stock’s 27 theaters is the CinéArts, at Santana Row. Fly received a note from a tipster this week who pointed out that CinéArts is one of only two theaters in the valley where one can see the new Gus van Sant film Milk. “To show a film based on a legendary gay activist fighting for gay rights after donating money to take away gay rights doesn’t make sense,” the tipster writes, demonstrating an admirable knack for understatement. Stock is becoming something of a nationwide cause célèbre, inspiring a nationwide boycott of his theaters.