I am not sure if you have ever experienced the Chinese firewall. If you just learn it from media, obviously you won't really know how it works.
The argument is, promoting anti-firewall here will alert the firewall and the wall will come A LOT EARLIER. The wall will (either automatically or manually) filter any sites with anti-firewall keywords.
In other words, even
this discussion might trigger it. You're screwed whatever you do.
As long as we use English, the risk is minimal.
Then Let him post in the Chinese forum, but use English.
Problem solved?
Not solved, because you are just promoting it to a wrong target group:99.99% of Chinese bitcoin users with good English ability know Internet circumvention. The potential harm outweighs the benefit.
Again, I hate the wall and I believe every Chinese bitcoin users hate it. I also hate self-censorship but we shouldn't take risks without a good reason. Just think again why Satoshi wanted to keep distance with Wikileaks.