This is a cool thing to do, if the university has no involvement then there is no violation. And for BYU to have even the slightest shot at landing him they need all they help they can get. My 2 cents is that BYU isn't in a strong enough conference as said by Parkers father, another part of me just can't see the previous number 1 player in the country playing at BYU.
"Two diehard BYU basketball fans have printed 6,300 T-shirts to be handed out before the Cougars' game Saturday with a message for highly ranked Chicago Simeon Career Academy senior forward Jabari Parker, who is expected to be in attendance."-ESPN
Brigham Young Cougars fans print 6,300 T-shirts to recruit Jabari Parker - ESPN Chicago