We are still actively working on the spam issue.
Botnet (Computer network)
A botnet can be benign, such as IRC channel bots. It an also be malicious in nature, used for DDOSing or other attacks. The installation of the botnet can likewise be either with the owners knowledge, without the owner's knowledge (See: Botnet), or by an attacker who installs it without knowledge on a compromised computer.
A common bot used to set up botnets on IRC is eggdrop.