Hi, first of all thanks for this awesome plugin.
I am not sure if thr is already a functionality for this in the plugin but Search Engines crawlers are getting banned on my website through 404 Detect and Ban module.
I suggest to add a functionality to this highly advanced plugin you have created for the WordPress community in which Search engine's IPs don't get banned. You can update the list every time you update the plugin or can use something you did in the Ban User/Bot module. Hope that make sense because its next to impossible for the common user to individually white list those wide IP range.
You can use http://www.iplists.com, Cheers!