As a general rule of thumb, the buck does stop at the staff, they should know the character of the kids they are recruiting. If they are truly "good" kids when they come to campus, then there is a mentoring problem.
Of course, its not an exact science, but there are reasons that some schools seem to have worse luck than others.
One somewhat example of this is Troy Davis. While his attitude was tip top, (and I did meet him in the library, he wanted some help with a library assignment) his grades coming out of high school were questionable to the point no one would risk a scholly on him except Walden.
The big Florida schools were all reluctant to give a scholarship until after he passed his entrance exams, where Walden gave him one before he took the tests. And yes, the "Big 3" all were courting him, and if I recollect correctly Miami(?) offered on the heels of our offer.
It was a gamble that paid off. Many of these gambles don't, as we have seen especially with the JUCO croud.