Children, teenagers, and eventually young adults, are not born with morals, values, ethics, or a sense of common good/evil. These are all traits that they learn and develop. Somewhat through their parents and family life, and some through their social environment. And in the same manner, certain people aren't born with an innate desire or belief to serve their country and to be part of something much larger than themselves. There are some that have developed these traits and desire years prior to applying to the academy, ROTC, or OTS. Same with the enlisted ranks. But there are also some that don't have these traits or desire when they enter military service/academy/ROTC/OTS. The vast majority of these individuals applied to such institutions as the academy for purely selfish reason. They were looking for a free education, benefits, etc... Most of these people will develop the selfless attitude required to be a great team player and military officer. But there will occasionally be those that maintain the personal, selfish, individualistic attitude where they only care about themselves. They will be the ones who do the drugs, selling, underage alcohol use on a regular basis, etc... These are usually the same people that aren't assuming advanced leadership or responsibilities in their cadet life.
My only opinion on this topic is that you will always have some of these cadets in each class. You can't avoid it. It's not possible. And if these individuals screw up enough, they will get caught. And I'm very glad they do get caught. The academies/military doesn't need these types of cadets/officers. And anyone who disrespects the cadets/academy/military members that much that they'll behave in this manner, I am glad that the rest of their lives will be impacted by these decisions on their part. No one was forcing them to stay at the academy and commit to such service. They were free to leave at any time. The fact that they selfishly CHOSE to do these acts with total disregard for the trust and respect they demanded of their classmates, peers, teachers, and the military; is enough to make me have no remorse if they are locked away for 10+ years.
Possession is usually something that you can't say: "IF they are guilty". Possession is proof in hand. Selling, transporting, etc... are things that could have other possible circumstances. But possession is pretty straight forward. If there is a misunderstanding, I hope they get it resolved. If it is a fact, then I hope the military hold them accountable and send their butts to prison.