Private universities can knock themselves out if they want to. As for state universites, they shouldn't do it but I'm doubtful as to the constitutionality of it being banned. Personally, I'm against any affirmative-action at all, be it race, gender, income, or blood-type.
Uh, a state banning affirmative action is not constitutional? Okay.
Sorry, I mispoke. I meant that I'm doubtful as to affirmative action being unconstitutional. States banning affirmative action clearly is constitutional. Thank you for pointing that error out.