If it was purely about socio-economic disadvantage then why wouldn't the decision be made based on proof of parent(s) income and or documentation of the situation. I think that there was a time for AA, when schools did not like blacks and didn't want them in their classes. There is simply no arguement for that today. To assume that just because someone is black they are poor and have tried harder is flawed reasoning. If you want to base it on poor schools, no money, etc, there are plenty of people of all races that fit this criteria. The discrepency is that two individuals could have the exact same life, low income, bad schools, single parent families, and one could be white, one black. The black person gets an admissions advantage while the white person doesn't.
Whoever mentioned racial profiling was correct in that its ok when it works to your advantage, stereotypes that support AA, but when stereotypes are used to your disadvtange you cry racism. I believe that everyone deserves a fair shot, but I think other methods should be used to determine someones disadvantage. It could still work exactly the same, but then only people who deserved the help would get it.