Sexual Orientation Question

There is something that has bugged me for several years now. I really have a problem with Christians who feel comfortable participating in websites that require them to list their "Sexual Orientation." There are plenty of passages in the Bible that warn against being unequally yoked together with unbelievers, light vs. darkness, children of the world not hanging around the children of darkness, etc... Think about it. We have indeed become WAY too comfortable with this world.