My 1.7.8.11 site suddenly started being hit by a registration bot three days ago (the upper and lower case random letter names one) and I gave your module a try. It has worked a charm and has caught 140 bot attempts in just over two days. 🙂👍
Is there a way to change the default to ban email as well as IP for these? They frequently use the same email address. My site has no newsletter and an embedded third-party contact form (a solution which allows zero spam submissions). So it's just registrations, and, in this country, it is pretty unlikely that we'll have any registrations with the email names being used.