Please don't assume things. Its possible that a topic creator can lock his topic. They can only and only lock their own topic. Not others. They won't get moderator rights.
Basically, right now everyone has to post on a lock request and teddy then locks it. Its a unnecessary burden on moderators. If the sale is done people will lock the topics. Most of them. Some will just leave it, so moderators can deal with that.
I understand that not everyone is gonna lock, some will forget but we still got moderators.
When most players will lock their own topic, its just going to help the moderators and ease the burden on them. Plus, moderators don't always lock the topics these days. I've only seen Teddy lock the ones that were requested.
There are lots of unlocked topics out there and its confusing. I need to ask players whether the property is still for sale or not.