Feature request from MonteShaffer, posted on GitHub Jan 18, 2016
I have noticed that the Captcha plugin is available, and I have implemented in my Magento 2 store.
However, in the past, I have used much simpler Captcha plugins, and am curious why this version is considered the core, without the option to choose from one of several Captcha plugins. A little counter-intuitive to the abstraction goals of Magento 2.
For example, Visual Captcha ... drag and drop an icon ... or click on an icon to prove you are a human.
https://github.com/emotionLoop/visualCaptcha-PHP