, Bas wrote

*snip* 

Quotes and threads in the list of threads don't get hidden though, nor do replies made to their posts [...] and it doesn't help this place looking like the worst community in the world to newcomers who don't have any custom CSS yet

Thats the important part and the tricky one to solve. Guess the only way is to appoint moderators than can hide threads in threads when derailing occours. Besides that CH9 need to rearchitecture the forum so it becomes possible to hide threads in threads.