Bans IP addresses that have been caught and blacklisted by Spam Karma more than 5 times.
Once an IP address is knee-deep in Spam Karma's blacklist, Spam Karma will never approve a comment from this IP, no matter how often it tries.
Unfortunately, many of these IPs don't stop trying, thus wasting your bandwidth and server resources.
This small plugin bans them.
Note: this is not a Spam Karma 2 plugin; that's different.