Once, in the early 1960s, there was as huge craze in France to do crossword puzzles, in a fiercely competitive context. It got to the point that people would drive to remote locations and have themselves timed and photographed doing the puzzles by teams of accredited timers and puzzle documenters. The craze was so bad that the birth rate dropped because everyone was doing crosswords, and the government had to step in and make puzzles illegal for nearly a decade.