I have never heard the show, and probably will never listen to it. From all the publicity I have heard and read in the past it is not anything that I would appreciate anyway.
That said, let me say that I am still researching to find out what actually happened, what was said that was so bad etc.
BUT no matter what was said, and no matter who said it, O&A are the hosts of the show and they are ultimately responsible for its content, along with their producer if they have one. I would hope that a show which is often offensive and has live guests who are not employees would be running a delay to prevent anything the hosts or producer knew should not be on the air. If they were not on delay, or did not press the dump button then they are saying they approved of what was said by their actions, and they should bear responsibility.
Whatever happened to personal responsibility anyway? Will nobody just stand up and say I take the responsibility for this action? Is that concept dead in 2007? Is appears it is.