But college attendance appears to trigger some surprising changes. When male students enrolled in four-year universities, levels of drinking, property theft and unstructured socializing with friends increased and surpassed rates for their less-educated male peers.
First, college guys drink? Nooo. I woodah never guessed. Second, does property theft include stealing your roomate's cds or downloading mp3s? Or are we talking about stealing bicycles and maybe the odd automobile? Lastly, this author lost all credibility to speak with any authority about absolutely anything as soon as they typed "unstructured socializing with friends." That can only be one of two things -- a euphemism or a category so ambiguous that it is irrelevant to discuss.
Unstructured socializing with friends could mean 1) sitting around playing Xbox while getting high from a six foot bong, 2) getting so drunk that you can't lay on the floor without holding on after having urinated in the neighbor's bush or 3) sitting in a barefoot circle while pondering the essence of the universe through free association.
My guess is that the author means 1 and 2, ie using substances and partaking in activities ranging from goofing off to petty larceny, which means that it is in fact a category so ambiguous as to be irrelevant.