Wasn't This in the Onion?
A forthcoming article Repenting Hyperopia: An Analysis of Self-Control Regrets, based on three studies with 63, 69, and 24 participants, claimed that college students and graduates were more likely to express regret over not partying during Spring Break than over not studying.
As far as I can tell, if this is actually the case, it is probably due to a belief that college is the last chance to party but you can find out the facts from others at any time. What happens when the others were also stoned instead of studying? Could that be the root cause of environmentalist nuttiness?