when I think of things that have really made me laugh some of them would be VERY offensive to some groups (mostly religious, and I believe in god)...I'm thinking about Sarah Silverman, Dennis Leary's no cure for cancer, Chris Rock etc etc.
Comedy is about offence to a certain extent isn't it as the funniest things are the ones that are closest to the bone, laughter relieves anxiety and therefore the graver and most serious something is (like the nazi's for eg) the funnier it can be (vis the producers for eg).
Dave Allen had it in for Catholics and my catholic mother used to weep with laughter at him. Derek and Clive take the piss about Cancer to great effect.
Now there are some 'comedians' that I think are shit: Bernard Manning springs to mind...but I don't think that banning them or censoring or protesting is the way forward, just don't view!
There are threads on here regularly about topics that mner's feel are off limits to comedy, most especially special needs. But I'm pretty sure that many special needs adults wouldn't appreciate being singled out as something that cannot be a source of humour...the ability to laugh at oneself including the tragedies and limitations of our lives is really important isn't it?
I maybe totally wrong, and maybe it's only ok if it is a special needs person doing it?