As title says. IMHO there's no point, while it does damage because it prevents users to set "block mixed content in https pages" in the browser, which is an important security option for websites where encryption matters (shopping, banking, etc). I'm not saying you must go all https if there are technical issues or costs in doing so, but you could just go http then, as it's of little use if such a core part of the page is leaked out anyway
Edited by udarnel, 05 January 2018 - 10:26 AM.