Hi,
Why do the explanations "break the feature"? The page is anyway not really blank if you add this message; but if the you already add this message, it should probably briefly explain what the page is, to avoid unnecessary confusion of MediaWiki users. Few more words won't slow down the page, will they?
it already explains it is intentionally blank. You may want to read up on: http://en.wikipedia.org/wiki/Intentionally_blank_page
BR,