People will learn to press all the buttons with scarry messages to ignore the wrong certificates. It may be a problem for credit cards and online shopping.
HSTS was specifically designed to block you from having any ignore buttons. (And Firefox refuses to implement a way to bypass it.)
But this is also why the current PKI mindset is insane. The warnings are never truly about a security problem, and users have correctly learned the warnings are useless. The CA/B is accomplishing absolutely nothing for security and absolutely everything for centralized control and platform instability.
HSTS was specifically designed to block you from having any ignore buttons. (And Firefox refuses to implement a way to bypass it.)
But this is also why the current PKI mindset is insane. The warnings are never truly about a security problem, and users have correctly learned the warnings are useless. The CA/B is accomplishing absolutely nothing for security and absolutely everything for centralized control and platform instability.