So youth is the ultimate sin eater then is it? With all due respect, that's just plain babble. These kids all have social media classes in high school and know what shouldn't be said or should be said. I refuse to accept that being young allows you to burn bridges or impugn the character of someone on social media.
Your analogy could not be more disanalgous. First, the admissions department (or whomever is awarding a grant or scholarship is going to be by and large intact. That is never the case with athletics, and certainly the football coach--in particular here given that if anyone was paying attention, Allen was on thin ice in August. Second, in your example, there is a binding commitment in writing between the school and the student --i.e., committing to university at a specific date gets you the treasure. Third, the academic scholarships are distributed based upon a specific set of criteria (for the most part). There is no rubric to follow for a football player. One man's trash is another man's treasure.
At the end of the day, what this young man said was silly. What makes this likely worse is that you have to wonder if he did this by himself or whether he had the help of yet another helicopter parent....