Extra dryers wouldn't do much to mitigate the more common bottleneck on laundry machines, people failing to empty them. (The machines now accept student ID cards for payment to the student account as well as quarters. Would it be that hard to make them e-mail you when the cycle is done, if you used your card?) I have often seen dryers sit for an hour or two at a time with a load of now-clean laundry in it, occupying a machine while other people wait for the rightful owner to claim his or her attire.
So I had a load of wet clothes in the washer that finished its cycle several minutes ago, and both dryers were occupied with completed loads- and had been for at least twenty minutes.
I wonder if the owner of the clothing formerly in the top dryer will object to my solution of taking a clean, just-from-the-box garbage back, labeling it as "The Former Contents Of The Top Dryer- Your Cycle Completed And I Needed The Machine", moving the clothes from the dryer to my bag, using the dryer myself, and putting the bag in a conspicuous place near the dryers?
...and why can't people just set alarm clocks or timers to remind them when to pick up their clothes? I'd think they'd want to minimize the chance that other people will steal them or, in frustration, throw their clean clothing upon the floor and dump water and laundry detergent on it. (I have seen this happen.)