I've heard people who work in radio describe the Janet Jackson Superbowl incident as a watershed moment. Not only did weeks of meetings and memos about "standards and practices" follow, but to this day it remains a moment in their careers that sticks out as a clear "before/after" point, a "life will never be the same" event."
At first, I thought they were exaggerating and being facetious or joking, but it actually was a major event for everyone in their industry: before the Janet Jackson incident, every radio program at their station broadcast live. If a caller on the air started swearing or saying "obscene" things, they would chide the caller and apologize to the listeners. Now, every program broadcasts with a 20-second delay, and they have a board operator with a "dump button" in case anything "obscene" is said. (As one talk show personality sardonically remarked, "What, are they afraid we're going to start talking about Janet Jackson's nipple?")