The NCAA has really never figured out a social media plan/regulation, so while they police phone calls with rigidity, they aren't anywhere with social media interactions it seems.
Boosters are a defined universe for the NCAA and includes fans of a specific team, and their conduct is subject to controls in HS recruiting, though I am not sure how well that gets defined re 'tampering'. Coaches contacting family of a player on scholarship to another school would I believe constitute 'tampering', but having conversations with HS/AAU coaches is standard practice and could contain enough subtlety to escape direct accusation while getting a clear message into the pipeline.
WCBB is still a pretty small community and players have lots of interactions across teams and conferences. A lot of information is flowing around the internet that is outside anyone's purview.
I do think we are seeing an alarming trend of mid-major stars being mined by top dogs in the sport whether that is instituted by players or coaches. The other side is that the bench on a top dog school may be headed in the opposite direction bringing some more talent to those mid majors.
And I wonder about how currently signed commits arrive in a few months feel about something like the BC C/F arriving on top of them at UNC, effectively cutting their prospective minutes in half? Do we expect some transfers next year?