Fun Police

Ruining people's pranks is a lot of fun.

Fun Police automatically detects Rickroll links, primarily on YouTube. When it sees a link it thinks is a Rickroll, it sends a message in chat to warn server members.

In my completely humble and unbiased opinion, this is by far the most effective bot for detecting Rickroll links.

The bot detects Rickroll links algorithmically using pattern matching and other tricks, so it works on new uploads as well. It currently has 850+ links stored in its database, built up from 4 years of operation.