An early 19 th century poster from Philadelphia warned citizens against the “dangers” lurking behind a project to link a railroad from the north to a railroad in the south. “Outrage!” it screamed in big, bold letters below an illustration of a runaway locomotive sideswiping a man driving a carriage, as an anxious mother, protectively clutching her baby, looked on. “Mothers look out for your children! … Dreadful casualty!” And if Philadelphians do not oppose the railroad linkage, the poster suggested, they could end up as – quelle horreur — a “suburb of New York!” Behind the poster were businesses that served people who alighted from one train and took the other. They would lose sales if the trains went straight through. This poster hangs in the office of FCC chairman Tom Wheeler, serving as a reminder that industry incumbents whose businesses were threatened would try hard to impede progress.…