I'm still processing everything too! But I DO remember on Saturday night (and I was in Row 3) Glenn giving a bit of narrative. Then he finished with words similar to 'and put that away and stop texting'. He DID sound a little put out as opposed to angry. It was quite early on in the show too. The person would have been in the first or second row I'd say.
I looked at Brenda in disbelief that anyone with the privilege of such a good seat would WANT to text! And I'd've been mortified if Glenn ever admonished me from stage!
The ushers told everyone individually as they sat down not to either text or video so it's not like anyone was doing it in innocence