I didn't connect CoinStar with students, but I guess it makes some sense, and is even part of their PR:

"BELLEVUE, WASH.--(Collegiate Presswire - August 1, 2006) - Students headed back to school learn quickly how to live on tight budgets. Coinstar (NASDAQ:CSTR), the leader in self-service coin counting, helps them increase their discretionary spending freedom while away at school."

http://www.marketwire.com/press-release/Coinstar-Inc-775154.html

People schlep their coins across the country to dump into a coin counting machine? I can see departing students doing this before leaving home, but it doesn't make sense. Perhaps the day off motivates townies to empty their ashtrays or maybe new tenants find abandoned coin jars from the subletters.

It doesnt take alot of coinage to overload the machines if you multiple each trip by a thousand. Maybe not every college kid walks up to the machine with 200 dollars in pennies, but its possible that a few hundred kids each hit up the machines with 10 dollars worth of coins...

Another thing to consider is that technology at colleges and laundromats across the country vary widely. Some places take coins , while others take credit cards and dollars. Some even force you to use a university card that can only be replenished online. In 2002 I spent a summer at another college a few hundred miles from here and brought 100 dollars worth of quarters with me with the assumption that it would be just like my school and everything would be coin automated. I got there and found out I had to sign up for an autocard and use a credit card to fill it, so much for my jar full of quarters. Of course I hit the local super market and coin starred them all, went to the bank, deposited the funds and repaid my debit card for the earlier purchase of university bucks.