Latinos and Latinas in Hollywood

Reviewing an article on actors who "you didn't know were Latino" today, and finding myself sort of worried about the things said in the article. 

First, I'm always bothered when actors "pass" as white, because it sends the message that their actual race or races is unacceptable.  Raquel Welch, Jamie-Lynn Sigler, members of Jersey Shore and especially Alexis Bledel have all made careers out of playing white or coded as white characters.  Bledel played one of the white main characters in a alarmingly white town of Gilmore Girls and the Greek American character in The Sisterhood of the Traveling Pants.  Fergie may or may not be passing, depending on who you ask.  I suspect most of my friends think she's white, but she's made a point of working with other people of color. 
Benjamin Bratt is quoted in the article as being disappointed at the lack of roles that Latino men have, which is part of what makes passing so bothersome.  Passing as white often just marginalizes people of color more than they already were, and in a world were they are always being marginalized, this is problematic. 
The other thing about this article is that it reveals the complicated nature of identity.  Harry Shum, Jr., despite being coded as Asian, was both from Chinese parents in Mexico. 
As a last note, I don't feel comfortable about the statements made some of the actors.  At one point, they mention a particular singer got his talent from being Honduran.  This kind of stuff is based on stereotypes, and even a positive stereotype can have a negative effect on people.