Thread:Support/MediaWiki:Red-link-title/reply (2)

This will likely not be accepted at least on WMF wikis because it would break the cache, I guess. I don't think it's a big issue, because unless the title is protected (quite rare) you will receive the message that you have to register or whatever to create it. The fact that you currently can't create a page doesn't mean that you're not invited to do so, if you gather the proper rights.