What I have seen, the reason why threads are locked is not politics, religion or any OT subject. All the threads I have seen locked recently are those that criticize Renderosity. Especially if you criticize the new TOS, the the thread is quickly locked, and your message may be deleted, too. Even here in the Community Center Forum, which was originally created for discussion about Renderosity, AFAIK. It seems that Renderositys answer to the problems caused by censorship is more censorship. Locking threads after 100 posts or so is not really justified either. Don't forget that there are thusands of members in this community. If the thread is locked, most members have never chance to say their opinion in the subject.