Optimally, only bad things would get made fun of, making it easy to determine what is good and bad-- but this doesn't appear to be the case.

How do you differentiate between benign comedy and "making fun of"? Is it just the implied intent? I've found this is an incredibly difficult line to draw, people are so variably calibrated. Many times couldn't have helped myself and have inadvertently insulted people. Later I have learned that quite a few laughs are not worth one wrongly placed offence, so I mostly joke among friends.