Nah, Chinese are pretty open to a wide range of topics. Also remember, 1/4 of the internet users on this planet are Chinese. I would say the Chinese side of the internet are pretty huge.
In fact, take a look at this:
Top Ten Internet Languages - World Internet Statistics
Not to mention there are people like me who went to both English and Chinese sites and I can say Chinese sites have rather good discourse. Far better than Western sources in a lot of areas, such neutral as political views in Middle East, South America. In fact, if you are trying to see some of the more pressing social problems in the western world, you are far better served on a Chinese site than a English site.
The reason is simple-----Both English and Chinese sites are subjected to domestic political pressure. Hence why English sites are not going to touch a lot of problems in the western world with a ten feet pole. English sites are also obligated (due to national pride, reader opinion, etc, very reasonable decisions) to down play or outright ignore achievements by "rivaling" nations. It is also required due to political correctness to ignore a lot of brutality committed by the western world.
Now, the Chinese sites are not anymore political neutral or impartial than English sites, however, the advantage of reading both Chinese and English sites is that you get the views from both side and by analyzing the data from both side, it is much easier to see the real picture.
One thing I will say though, the Chinese language is a heck a lot better language for writing literary work than English.