I don't. The agent was told it needs to provide a website for opting out of the scan, and it seems entirely LLM-like to try to be extra helpful and also spawn opt-out bots on various relevant communication channels. The IRC bot was a subagent as it itself mentioned.
And it stated in the response to the website request that it would do so. So for it to be a fellow IRCer prank, it was a) the LLM's idea; b) only possible because the LLM didn't follow through for whatever reason; and so c) the 'prank' was pretending it did?