Okay, so my answer is more than one...
Scoot the rebounders back one block during free throw attempts - like women's college ball.
Require 3-man mechanics for schools with enrollment exceeding a particular number - the largest schools.
Recommend an evaluation/ranking system (methodology) that would actually work for most associations. And have it include that if a coach blackballs you from their games then they cannot evaluate/rank your performance.
And the only thing I see wrong with locating the coaches box in the parking lot is that you won't get to see their frustration once you have them seatbelted.