So, once a topic is created it can get filled with spam and we can't prevent that, we are just dependent on moderators deleting it?
You can still report all the posts you consider to be spam and moderators will probably delete most of them, if you created that topic.
It wouldn't be fair to change topics from normal to self-moderated later and I think scammers could abuse that function.
Just lock the old topic and create new one that is self-moderated... it's not that hard.
Doesn't make any sense in my opinion because I see zero reasons to disable it. It's just beneficial for spammers.
It doesn't make sense that you can't delete topic you created, but you still can't, and many other things
