Yes fair enough, we can’t police every comment but generally it is true, I haven’t seen any Avengers spoilers in the Marvel thread but if you are avoiding all trailers then that’s another level. To be honest Daredevil has created a new problem with the Netflix model, normally it would have gone with an open spoilers policy as a show that’s just aired but because they dump it all at once everyone will be at different stages. Kevin Spacey was asked with that model when you can discuss spoilers and he said ‘never’, which is a nice reply but difficult when it comes to message board threads.
As to threads on subjects, it’s down to the community, anyone can start a thread but get too specific and it may not have the traffic to carry it. Certain TV shows like Game of Thrones or Doctor Who have shown they can and others fall away. With films as it gets closer to release there is more to discuss, if I started a Thor 3 one now there wouldn’t be much to say but with FF it’s not far away and seems to be doing fine now it’s started.