I'm not sure what it is that you're arguing against, where did I advocate shouting abuse outside a school as a productive way of doing anything? Perhaps you could clarify your argument somewhat.
Civil debates are great, I'm happy to have more of them. At the same time, works like the Life of Brian (and many others over the years) sometimes manage to convey more thought-provoking critique per unit time than any civil debate I've ever seen. Having to tune out a measure of tasteless humor is the price we pay for enjoying these brilliant works because there is no more a way of legislating good humor than there is of enforcing quality journalism, good music or any other creative human endeavour.
Why do you equate comedy production with obnoxious shouting in public? It doesn't even make sense as a strawman. I don't produce comedies because I'm not a filmmaker. I don't shout random insulting things in public because that's just dumb. Neither fact contradicts any of the views and beliefs I've expressed in this thread in any way.
Civil debates are great, I'm happy to have more of them. At the same time, works like the Life of Brian (and many others over the years) sometimes manage to convey more thought-provoking critique per unit time than any civil debate I've ever seen. Having to tune out a measure of tasteless humor is the price we pay for enjoying these brilliant works because there is no more a way of legislating good humor than there is of enforcing quality journalism, good music or any other creative human endeavour.