Yesterday, I was listening to the Don and Mike and they were pestering some woman off-the-air to get on-the-air with them. This isn't really unique in-and-of itself, but it made me think of something...
I used to listen to their kind of radio years ago (mid-90's), then stopped listening to anything except sports radio for a couple years, then came back to this recently. I remember back in the day when D'n'M and other type shows could just call people and throw them on the air and do things like "wacky morning prank calls" and such, but now I'm hearing assorted radio hosts (new stuff I'm listening to) having to get (sometimes badger) for people's permission to get on the air now.
So my question is: What law changed this, when did it happen and what incident caused it (since most US laws nowadays come from people getting pissed off and suing)?