I read a little about the forum rules and found nothing against posting your own suggestion threads. So why are people locking every single suggestion thread except for one? I understand that you want to minimize the ammount of suggestion threads posted, but why? What's the point? A forum is meant for discussion. There is no need to have a lower ammount of certain threads. People should be allowed to post what ever they want, as long as they are following the forum rules, without getting locked. Here's what I don't like about making one thread for suggestions:
You don't recieve direct critique. Since you haven't started a thread with your ideas, no one really tells you what they think of it. They either post their own ideas or will be discussing something else. Someone might discuss your ideas, but it's kind of annoying when a bunch of other people are posting things into the same thread, and you have to dig around to find responses, if there are any. It's just a lot more simple if there's a single thread for your ideas.