Knitting during a play!
Disrespectful to the cast and crew and the work they put into the play!
Disrespectful to the audience!
Best time to tell someone in the audience that you are finding them distracting during a play!
During one of the intermissions.
After the play when they are talking to the play's author.
I will post a stinging note about it to my blog and secretly hope they come across it someday.
I will take my opinion of their obnoxiousness to my grave.