I'm a college student, and while I've never seen first-hand a situation like this, I can attest to the widespread casual use and sale of adderall on campus. During finals last December, I was offered a pill more times than I can remember, just $5 or $10 bucks a pop.
I don't think I knew anyone that was actually diagnosed with ADHD that was taking the pill to study. Some of my close friends joked about how easy it was to lie to the doctor about your symptoms. Most of them got a prescription on their first visit.
Looking at LinaLauneBaer's comment shows that there's always two sides to a story, that sometimes these drugs can be a godsend. But I'm going to side with the NY Times on this - adderall is really, really easy to get ahold of on a college campus. It's a casual use study-enhancer that dictates sleeping, eating and reading habits for kids during that final crunch week of each semester.
I'm thankful nobody I know has endured anything worse than temporary dependence.