"I guess I think it's important because it's not an isolated incident. Rude and inappopriate behavior is becoming more and more common. And the more people turn a blind eye--or, worse, approve and say "Oh, let them have their fun"--the worse the erosion in civilized behavior."
To take it a step further I think people refrain from saying anything about the behavior is fear of some sort of retribution. I seem to recall a thread about an incident at The Little Mermaid which turned into a physical confrontation when someone asked another person to stop talking during the show.
Or, a few months back, I was at a show and the people behind me chattered all through the first act. I finally turned around and asked them to please be quiet. During curtain calls when my friend and I stood and cheered for our friend the people behind us started poking me in the back after we sat back down. They told me not to stand again because they couldn't see. Would they have said that had I not asked them to be quiet? I doubt it. But they probably felt the need to "get back" at me.
And don't even get me started on the Ace Young fans at Grease. You couldn't even explain to them that their behavior was inappropriate. They'd paid for their tickets and felt that gave them the right to do whatever they wanted.
And that's a pretty widespread idea. People feel they can do whatever they want to whenever or wherever they want to. Doesn't matter to them if they're being disruptive. Their own enjoyment is first and foremost on their minds.
"All our dreams can come true -- if we have the courage to pursue them." -- Walt Disney
We must have different Gods. My God said "do to others what you would have them do to you". Your God seems to have said "My Way or the Highway".