Like all things, there are two sides to any story. This reporter was barred from attending the event, and got into a bad situation and is angry at the outcome. Take what is said with a huge grain of salt.
Now. I don't know why she was barred, maybe it was a conspiracy or maybe she just didn't follow Yale's procedures for attending an event. However barring someone from attending doesn't mean they are trying to hide someone.
More likely than not, the reporter is trying to garner press because she feels slighted.