All private schools recruit. They do. Once a prospective student-athlete's family has formally contacted the school's admission office, a coach can call that kid on the phone every day, trying to convince the kid to come to the school. That is 100% legal. Schools also do the same with performing arts programs, and they do it with students who have the potential to become merit finalists. All private schools are in the business of recruiting.
From a sports standpoint, the recruiting becomes illegal when there are other inducements to try to convince a prospective student-athlete to enroll at the school. Schools that have discipline and a respect for TSSAA regulations don't offer those inducements. Any claim here to the contrary should be backed with evidence.