How much input does/should the OP have in controlling a thread?

The way I’m reading this thread is that it’s about what posters want, not what’s currently happening. I disagree with the handling of that thread along with the people in this thread linked here.

I guess that brings up the hypothetical possibility that someone could tailor their OP so narrowly that no discussion is possible. For instance, in an existence of God thread, an atheist might start a thread asking for proof of the existence of God using only science and no quotes of the Bible are allowed. Or conversely, a religious person might ask for the non-existence of God but only Bible quotes are allowed.

That’s a fair discussion, but I don’t think it’s a big deal. If people want to engage in that kind of discussion, they will. If they don’t, the thread will die off the page.