Roger Ebert relates the following anecdote in one of his reports from Cannes:

During the screening of [Australian film] "Human Touch," I had the misfortune to be seated next to a pathetic creature who was receiving e-mail messages on his pocket device, and replying with taps on his clever little keyboard. The tiny screen was bright green in the darkness. I asked him to stop. He said, "I have to do this." I said, "Then you have to leave." He continued to tap away. "The director is sitting right over there," I said. "How do you think he feels?" "I don't care how he feels," the cretinous man replied. "Stop it, goddamn it!" I said. He stopped for a while, and then took a little peek at his screen from behind his hand. "Why don't you go outside?" I said. He did. He was the only person who left the full house; his electronic masturbation had blinded him to the film's greatness.

After the screening, I mentioned the incident to ["Human Touch" director] Paul Cox.

"If he had started typing one more time," said Cox, a genial and philosophical man, "I would have ripped his bloody toy from his hands and smashed it to bits beneath my feet."

It was enough to make me wish the cretin had continued.