Shame game: When the joke’s not funny anymore

IT used to be considered rude to point and laugh. When did that change? I’m trying to pinpoint the moment when I crossed the line myself. One day, I used to find that kind of thing voyeuristic and mean-spirited, then the next, there I was at the front of the huddle around the computer screen guffawing at the latest celebrity blooper.
It was hilarious stuff — the newscaster touching up his make-up; the continuity announcer fluffing her lines; the A-lister tripping on the red carpet.