I just read about this in the guardian, I'll put a picture of the heading of the article.
He says he "thought" the audience member was sending emails on his laptop. I wonder how he knew that, presumably he couldn't see the screen, and signal in theatres is dreadful. I would take a punt that he was in fact playing minesweeper.
I'm going off topic. The reason I wanted to post this is because it leapt out as me as a parallel to typical behaviour in many of the (Good!) schools I've taught in. Low level disruption. Except it's not one audience (class) member, it's most of them.
So I had to smile wryly to myself that this made the national news.
Either the audience member had very good reason, or this is a natural follow on from the deterioration of respect and good behaviour in schools.
Oh actors, come teach the dear children!