Very good point, but on my screen it says that I can start new topics and reply to them!?
You can start your own thread and reply to replies in your own thread. There's nothing wrong with that. (Although CoS Members are often encouraged to ask downstairs.)
But, just because you have the ability to reply to the posts of others, doesn't mean you have permission to do so.
Committee for the
Promotion of Vice and
Prevention of Virtue