Young boys / men (ages 15-22) / are stupid. Sorry but it's true. If someone bashes in all of the mailboxes in my neighborhood - I can save the COPS a lot of time and effort and narrow down their search: Officers - look for: 1) Young 2) Boys / Men. Same goes, if I am walking into Walmart - and someone flies by me driving 50 mph in the parking lot. I don't have to look (15-22 year old male). High school boys probably say and do things every day in the locker-room that would get me fired from my job. Their brains aren't fully developed and they, generally, have a lot of maturing to do.
What said young man did, was stupid. It was insensitive. I am certainly not condoning or excusing what he did. I bet (and hope) that his coaches handled it swiftly and properly.... I know my high school coaches would have. And... I bet this stupid prank was done to someone he considered a friend (I could be wrong here). But unless there's more to the story, I don't think this disqualifies him from playing college football for Texas. Lest most young men would be disqualified.