I remember one time in China, I could only read some news about what was happening in HK on some tabloid websites (all other news websites were blocked by GFW), so all that celebrity gossip etc. acted as a random noise to hide the message
For a message receiver behind a censor system, he can always deploy a personal VPN or other more sophisticated tool.
But for message sender who want to broadcast to the public under the censor system, this technique may be useful.