@tenants, you are ruthless! Haha. Just updated, 5 mins ago, and have added about 20 bad IP's to the cache with your "secret ingredients".
I have also had what appears to be one false positive with the Same IP Session Switcher. At 9:45, an IP was added to the cache (same IP session switcher, no javascript). At 9:46, javascript detected and IP removed from cache (username logged this time).
Interestingly, 20 minutes later, the IP was again hit with the Same IP Session Switcher (no javascript, not logged in). This time the user didn't log in, and IP was not removed from the cache. Weird.
I'm very appreciative of this addon, and have been using it for months!