This was particularly pronounced among the private colleges in the study. For minority applicants, the lower a family’s socioeconomic position, the more likely the student was to be admitted. For whites, though, it was the reverse. An upper-middle-class white applicant was three times more likely to be admitted than a lower-class white with similar qualifications. ...
But cultural biases seem to be at work as well. Nieli highlights one of the study’s more remarkable findings: while most extracurricular activities increase your odds of admission to an elite school, holding a leadership role or winning awards in organizations like high school R.O.T.C., 4-H clubs and Future Farmers of America actually works against your chances. Consciously or unconsciously, the gatekeepers of elite education seem to incline against candidates who seem too stereotypically rural or right-wing or “Red America.”
This provides statistical confirmation for what alumni of highly selective universities already know. The most underrepresented groups on elite campuses often aren’t racial minorities; they’re working-class whites (and white Christians in particular) from conservative states and regions.
--Ross Douthat, NYT, on extracurriculars to suppress on your college application