By George Plimpton — In 2000, George Plimpton starred in a reality prank show called PLIMP’TON that promised to “startle unsuspecting youths with unexpected japes and jests.” PLIMP’TON’s pilot, which never aired, featured him passing himself off as A. Romfort Finch, ace pitcher for Mullen Township Pony League team Mister Submarine. Instead, he wrote…