It's not school you put on the credit card, it's Wiis and Xboxes and movie tickets and Taco Bell. But you're still an idiot.
If you discount the baristas that are current liberal arts majors, I think it's close to 100%. I went to a small, private, Christian, liberal arts school and so many of my classmates did some time for S-bux. They eventually got real-er jobs, but still not in their respective fields. I took my English degree and dealt cards for four years. I wish there had been someone to tell me "hey, dude, you can't get a job with that degree." Or at the very least, "hey, dude, get an internship."
Anyway, prison sucks. I know being in incapacitating debt does, too, but it's not the same. You can still always declare bankruptcy, or even better, just stop paying on the loans. You'll lose what you have, and your credit will be ruined for ten years or so, but it's not like you're living the good life right now with that 30K in debt.