On the other side of the argument, I think many would ask where do you draw the line? And who draws that line? It seems like the majority of the people I know feel like it's better not to draw that line at all and instead focus on teaching people why these arguments are wrong. The failing of our education system is another (bad) problem entirely.
Ex: what if the government one day decides that criticizing the government is too offensive?
This is what I'm concerned about too. Where I'm from, offending those in power/religion/etc will get you into a whole lot of trouble. When I was young, maybe two decades ago, there was an inkling of hope that perhaps one day my people would follow the Western ideal(at least to an extent), when it comes to free of speech, human rights and so on.
Unfortunately, I don't see this happening anymore. I don't want to sound gloomy, but the web back in the day had a completely different feel to it. I'm sure I'm not alone in saying that I can feel it's vibrancy dying. Maybe it started a while ago.
Anyway, there's still hope with decentralization and such. I suppose we'll just have to wait and see.
Ex: what if the government one day decides that criticizing the government is too offensive?