Like so many artistic genres, taste is a very important element in comedy. Some people can be deeply offended by comedy acts that others find hilarious. In a perfect illustration of this, one of the Sunshine Coast's prominent citizens - marathon runner Ron Grant - was disgusted by ventriloquist David Strassman's comedic act. He got up and made quite a scene before leaving.

Of course this sort of thing still happens regularly at entertainment venues all over the world. But it usually involves hecklers who aren't well known, so it doesn't make the news.

What I find interesting about this incident is that it illustrates some of the conventions of live comedy. Firstly, that the medium requires that audience members know what to expect. And like so many entertainers now, Strassman is pretty racy ("dark and edgy" as he puts it) and uses profanity in his act.

What's fascinating is that Mr Grant didn't know what to expect. This is very surprising, since Strassman is very well known in Australia. He's performed on Hey Hey It's Saturday! and other Aussie shows countless times. But even if you were not aware of Strassman in particular you'd still expect a bit of rough language, surely. Pretty much anything that's funny nowadays also has a bit of swearing in it.

Like all hecklers, Mr Grant was oblivious to that other main convention of comedy: respect. Even though it's not like serious theatre, which has a "fourth wall" and demands silent deference from those watching, live comedy still needs a bit of respect for the performer for it to work. The performer addresses the audience directly, conversing with them in a way, but it's still a scripted performance, and a lot of work and preparation have gone into it. The polite thing to do if you don't like a performance is to just exit unobtrusively. Sure, it's reasonable to complain back at the box office, or even ask for your money back. But to actually disrupt the routine itself is really rude, particularly when the crowd is clearly enjoying it so much.

One wonders if this guy would have done the same thing in the middle of another kind of show. Would he get up out of his seat and then walk onto the stage in the middle of a drama and berate the actors? Somehow I doubt it. Everyone knows that kind of behavior is just not on.

But it's okay to do it at a solo show that's getting laughs. It's always the way with comedy, isn't it? It just don't get no respect!

Unfortunately the planned two day Sydney comedy event The World's Funniest Island has been cancelled. This has provoked punditry about why it may be, and also thoughts on the the respective comedy cultures of Sydney versus Melbourne.

I've performed comedy in both cities. And there is definitely a cultural difference. Melbournians do take their comedy a lot more seriously. They are also quirkier, I think, and can be more experimental. Melbourne is easily the nation's most left-wing city, and so the comedy does tend to be more politically correct.

Sydneysiders are more brash, brazen and even ostentatious. (It's no surprise that Austen Tayshus himself hails from there.) The comics are also less PC, though still left-leaning. And they do tend to do material that would receive appalled gasps down in Melbourne.

Also, I think Sydneysiders generally aren't as interested in the medium. So, the fact that this event was cancelled doesn't really surprise me.