They were the usual chatty bunch of teens, catching the last train back to the western 'burbs that would get them home in time for dinner with the family. On any other Saturday in springtime they might have been coming from the mall. But on this day their Abercrombie and Fitch outfits were adorned with buttons and peace stickers. A couple of them had cameras slung around their necks. ``I mean it was a little disappointing,'' chirped one young woman. ``You know in the middle of this die-in, people were on their cell phones. It just didn't seem right, you...