Prominent? A crossed over lock icon in the address bar? Try again.<p>A prominent warning would be something ridiculous, like a full page cover saying &quot;THIS PLACE IS NOT SECURE – HERE BE DRAGONS!&quot; or something. Browser vendors should do more of this for egregious errors on the publisher&#x27;s side. Unless users complain loudly that stuff is uncomfortable and broken and scary and what not, you can write articles like this every day of the week and publishers still won&#x27;t do anything about it, and the only users to care will be the geeks who understand what the damn icon means in the first place.