I think it is a sad reflection of the fear amongst CX, Dragon and other AOC holder's pilots in HKG, and CAD ATC that if they put their real name on a posting, even if it is on a mildly contentious subject, that they will be seen as a tall poppy by the junior managers whose job it is to monitor web sites.
From my knowledge of the workings of our fleet management they do not have the time nor the inclination to read and police web sites. Indeed many of the handles of pprune posters are known to management (including mine...) but as long as you don't, "bring the airline into disrepute" you can bitch and complain all you like and cast aspersions as to the marital status of the parents of most managers. Water off a ducks...
So it is a perception thing. People don't want to put their names to a post in case they get fired, but the reality is that within the normal limits of pprune protocol nobody in management gives a toss what you write.
Danny, PPruneTowers and Jet Driver were skeptical that a Fragrant Harbour private forum would work and it took several years and some persuasion before they tried it. Looks like they were right all along.