DC -I'm mildly surprised that you weren't tossed out. I went down to
Tampa last year for the USF game, and while buying my ticket the
day before the game, I stuck my head in the arena and saw that our
kids were practicing. So I went in and sat, unobtrusively, in the upper
bowl. After a few minutes, a manager came over and told me it was a
closed practice and I 'd have to leave.
Maybe you weren't bothered because these aren't official practices.