ReCaptcha on EasySocial 3.x
Setting up recaptcha on EasySocial is pretty simple.
Setting Up ReCaptcha
Navigate to Easysocial > Custom Fields > Custom Fields > Recaptcha and enter your Site Key in Public Key and Secret Key in Private Key.
Next, go to Easysocial > Custom Fields > Workflows > User Workflows > Insert New Custom Field > Recaptcha and you can either turn on Appear During Registration and Appear in Quick Registration or any one of these.
That's it! ReCaptcha should appear in the registration form.