Should any topic be off-limits when it comes to humour?

[VGPolyglot]

o_O.Q said:

VGPolyglot said:

Essentially the audience decides whether its acceptable or not, if they don't like the tone of the joke it'll be known through their reaction.

do i really have to go into why this is a bad idea?

Do I have to go into why it's a bad idea for the audience not to display their disapproval?  Should they just have to be quiet and not be able to say their opinion at all?