For most of us that means an untrusted cert, and hence a browser warning, but that's equivalent to the browser padlock icon when browsing http (and arguably safer).

Plus, if you are browsing or publishing using plain ip addresses you are already outside the "regular behaviour" so users doing that will be happy to click through.

However this subthread is irrelevant to the main thread. The https/http question is unrelated to the dns question, since dns applies to both equally.