There are plenty of open threads with such topics already if you use the search forums, I just had started a new thread to ask a specific question that wasn't addressed in any of those threads, or none that I could see.

If they lock threads, the threads can still be viewed so I don't think it's so bad that mods simply lock threads. Also I think it may also be because they want to stay on the good side of Blizzard in case they do end up coming up to these boards. Would hate to have this website and all affiliated sites and programs get blacklisted because people decided to start controversial discussions on these forums that break ToS and EULA.

But I can see what you're trying to say as well, however these are their forums. Let the mods do their job IMO ^_^