Well, considering they have to graduate high school first after 4 years, and then actually get into a college, and then PAY for it, it doesn't seem as catastrophic as you and the article make it. I'm sure the affidavit they have to sign has some kind of deadline as well, so its not just paying lip service. Obviously, if it just says "do you promise to try and become a citizen? All right, cool," then its a bit of a problem on the enforcing end.
Besides, there was actually a good point brought up in a film I saw once in school. Basically, there was this family of illegal immigrants. One daughter came here when she was two or something. In high school, she was actively involved with SGA, and had a 4.0 GPA, but couldn't go to college because she was an illegal immigrant. Another daughter was born here, glided through high school with C's, and got into college. I'd rather people who deserved it get into college, and if some illegal immigrant students are smart enough, I'd rather they be let into colleges to maximize their potential as future citizens.