So how are these externalities dealt with where there is no such thing as insurance for this type of breach? There's no way to put the toothpaste (my private information in the form of answers to personal "security questions") back into the tube (only my brain or nearby sphere of influence).
And this goes along with IoT devices that aren't having their known exploits patched by their manufacturers. Similar problem different details.
So without broad laws that say this is wrong and here is a mechanism to attach a tangible cost to this information so a proper risk assessment is done, I imagine we keep seeing this happen with essentially no punishment beyond what Yahoo already is getting punished for.