Georges - Anti-troll IRC bot
An advanced IRC bot to deal with trolls and spam. It efficiently stops spam waves and frustrates spammers.
It uses a number of techniques and pieces of information in order to pinpoint bad behaviour. It is fast and precise with virtually no false-positive because its decisions are not based on a single technique.
The techniques include fingerprinting through CTCP, IPs, reverse DNS, GeoIP, Tor checks, open proxy checks, message size and frequency, nickname hijacks.
Sources at georges - Anti-troll IRC bot.