Don't anticipate problems.
This site is only 45 minutes old and we've already started a thread to decide what posts should be closed here.
I can understand the desire to get to work trying to figure out the entire scope of this site in one exhaustive thread, but as a general rule for building a new community, it is typically better to wait for problems to become invasive in actual practice before we start actively seeking to create a lot of rules discussions around hypothetical situations of how people are going to do this site wrong.
If you see a problem that is concerning for you on the actual site, by all means, raise it here. But it is simply waaaay too early for an all-encompassing "what does not belong here" thread when no actual problems have been observed on the site itself. It's just not a great way to build a new community.
That is why I closed this thread.