I was at a First Communion on Saturday where, at the start of the ceremony, the priest asked people to be discreet if they wanted to take photos during the Mass. He also reminded them that there'd be plenty of opportunities to take photographs afterwards. Despite this loads of parents were standing up in their seats and in the middle of the aisle, blocking other people's view of the altar and clicking away when it was their child's turn to do something. Not just taking one photograph but loads, so they were standing for ages and other people had to crane their necks to see what was going on. What part of 'discreet' did they not understand?