Tangential but related: Toontown Online had two communication systems: "speed chat" and "secret friends". Speed chat is basically safe, prefabricated messages.

Tangential but related: Toontown Online had two communication systems: "speed chat" and "secret friends". Speed chat is basically safe, prefabricated messages. Secret friends is unfiltered text chat, but only between people who have swapped friend codes. Since the game didn't support swapping friend codes, they were trying to make sure you only connected with people you knew. However, players figured out a language to encode friend codes using speed chat phrases. So you would send a series of speed chat messages, the other player would send some back, and then you'd have each other's friend codes.