This man hit the nail on the head. It's the big leagues. BD is not even a bunch of kids as much as they're a bunch of young adults (20, 21, 22). If someone is too thick skulled or insecure to realize that the booing is not a personal attack on their character but a groupthink statement of disapproval of the direction of the activity, it is their own fault. Booing is not my cup of tea either, but it is really the only way for the masses to make it known that something is fishy about a corps getting near-perfect repertoire scores for rolling out mirrors and chairs onto the field for the past two years. Performance scores, sure, they are solid gold, give them top honors, most talented kids in DCI... But the bottom is line is that 2-5 did harder (I have watched mid-season shows over and over and have numbers to prove that BD played 20% less than the rest of the top 5), more engaging shows , at a lower level of achievement sure, but that is the grey area that DCI has left open for debate for a while now, and that is why you hear booing. It has nothing to do with the kids and they should know that.