I'm torn on this. As true as it is that freedom of speech is a direct license for trolling, as soon as you give someone the power to censor things "for our own good" you run the very real risk that they will start censoring by their own agenda. In the English speaking world the boogey man today is called child porn. You can do anything if you say that it's to stop child porn. US ISPs recently
censored big parts of usenet on this pretext. There is no way they would be able to justify this if they hadn't said the magic words: child porn. Australia is now considering a directive that would enforce a wide scale internet censorship,
blocking not just child porn but a bunch of other things. The tampering, if passed, would be more severe than they do in Iran.
Just as there are magical words like "god" that you can use to get people foaming at the mouth, there are other words like "child porn" or "terrorism" or "communism" that you can use to make people lose all sense of proportion and agree to the most insane things for their own "protection".
So what's more important? The free exchange of ideas or freedom from unpleasant expression?