Schools like Fork Union and Hargrave guard the privacy and the access of their students pretty heavily. You have to go through the school and the coaches to contact their players. You cannot call them at any time and the mail goes through the school.
Most of the players there have been "placed." And the schools do everything they can to make sure that players honor their commitments. If a kid wants to reopen his situation, it's a big deal and most players tend to try and circumvent the school (it's easier).
I'm sure that Jackson has a relationship with the coaches and administration there that will vouch for him. Even if a player didn't commit to a school, I'm sure they have solid relationships with the guys that recruited them. You spend a year (or more) getting to know the kids and their families. You're going to lose most of the kids you recruit, you can't keep grudges. If the guy was upfront and just chose another school, you can't be an ***hole.
Unless you're Bo Pelini.