My personal opinion is it would be a good idea if a person has proven themselves worthy of such a power. If you have been at RZ for a few years and haven't been any trouble then you have proven yourself mature enough to have such a power.

I really only see it being good for possibly controlling flaming in a thread that person created. Say I create a thread somewhere and it turns into a flame war....mods can get busy and sometimes take a while to take care of things...so I have the ability to "abandon thread" so to speak and lock it to control said flaming.

I can also see how someone being upset and not getting to respond in said flame war would probably just create a new thread to "get the last word in".