There's a big difference between word filters and this: this one has a chilling effect. The intent is to send a message, but that message is a threat.

If you are a spammer and get past the filters you win, if you get past the word filter here the thought police can still decide to punish you.

The more successful you are the more likely you are to be punished instead of being rewarded. It will require self-sacrifice to actually work on "dangerous" topics.