This has probably been said already,and I just forgot (which is pretty normal for me) ,and may even not be correct, but I figure Erica was supposed to be paid, performing or not, at HoF. And since she is on the clock, she is covered by Cowboys' insurance . They kept her in the locker room so she would not injure herself further. But she toddled off. If anything would've happened I think the Cowboys would've been liable. I think that was the straw that broke the camel's back. It was very inappropriate for her to do so.
If I were one of TPTB for the Cowboys, I would've kicked her out in a New York minute. You don't mess with people's pocketbooks