Philosophy professor Steve Gimbel wrote an article for USA Today about the value of April Fool's Day.
From USA Today:
There is nothing intrinsically wrong with offending someone or with the joke that caused it. We need to stop crying foul at every joke and consider whether it helps, harms or merely amuses. In Shakespeare, it is often the jester who alone speaks the truth. We need to give our comedians a wider berth because they perform a valuable function, not the least of which is making us laugh, something we all should do more.