Esther McCarthy: Are manners outdated? Is it ever okay to play loud music in public?

"Perhaps a subtle social cue will suffice. I make like Granpa Simpson and give them the glowering of a lifetime. But damn my fabulously oversized sunglasses! They render my stink eye powerless!"
Existentialist philosopher Jean-Paul Sartre must have been after a day at the beach, or a stressful aircoach ride, when he came up with his observation that ‘Hell is — other people’.