I'll counter-question you, then.
If the Speaker is going to enforce the rules and he thinks that members of Parliament have to do it, if he were in Taiwan he would be in real trouble, because they jump across and kill each other. There's the House leaders' meeting, which says to stop heckling, and you say heckling doesn't make Parliament dysfunctional. I think it does, because it's juvenile.
So if the Speaker were to say “No heckling, everybody behave yourself,” the person looking at you from home would say, “Why is this member heckling? What's the matter with him? Why is he shouting? If you did that in school you'd be in real trouble.”