I am going to go with someone whose been there and lived it.
No doubt coaches tell their players, they really want this guy, make sure he has a good time, and most of all, let us know if he fits in. They don't tell the players to get the recruit drunk.
Times have changed, many players have already committed before the official visit, but don't think for one moment that NO drinking takes place on official visits, or when your player heads off to college. These are all temptations for every college student, baseball players are no different, it's just a matter of growing up and maturing.
This is something no one really talks about, but reality is, my son had a real great time when he went to school and that included much of what we all did when we went off to school for the first time.
Your sons do (did) to, they just don't tell you about it.