In order to really hone-in on our quality content in Google rankings, we put our "Off Topic" forum behind the login. There are tens of thousands of posts in that forum, and the XenForo sitemap is still generating them as part of the sitemap. Even though technically anything that is behind a login (not public) shouldn't be in a Google sitemap. How can we get these out of the sitemap? Another problem that is happening because of this, is that our crawl errors page is constantly full of thousands of 403 errors which I would prefer not to be there, so we can focus on the real issues. They are drown out by these unnecessary 403's. Google keeps trying to find them because the sitemap has them in there.