Couple of points of clarification.
First, the issue is whether the kid is recruited. If he's recruited (official campus visit, home visit), then all the loopholes in the world don't keep him from being an IC.
Second, while tuition remission is great (and I've been told UM changed the rules on eligibility, so it's uncertain if Ishmael would get 100% remission based on his father's tenure at UM), he would still have to pay for room & board, books, etc. So it's not free-free. I believe that the additional cost to attend (beyond tuition) is getting close to 20K these days.