SignalA fully-featured and powerful r9k bot.
The bot attempts to improve a channel's signal-to-noise ratio by requiring all messages to be unique. Every time a message is sent into the selected channel the bot will compare it to all previously sent messages, if it's deemed too similar the message will be deleted. If the user keeps sending unoriginal messages they will be temporarily muted based on the number of infractions.
This system will promote slower but more thought-out conversation amongst members. Shortly after all the filler messages have been used up members will have to resort back to having more verbose yet constructive conversations with each other. The channels in which early prototypes of this bot were tested quickly became favourites amongst the userbase for offering both consistently solid discussion and enjoyable casual conversation.