Thirty-seven years ago, 125 million people tuned in to watch the series finale of M*A*S*H. The much anticipated episode, “Goodbye, Farewell and Amen,” aired on CBS for 2.5 hours. Those loyal viewers remained glued to their seats, and when the show finally ended rumor had it that people rushed to relieve themselves as millions of toilets flushing simultaneously overwhelmed sewage systems across America. Of course, this urban myth is overblown lore. While toilet use during breaks in large-audience programs can certainly be substantially higher than average, they have never caused serious damage. Sewage systems. . .