Strafe does not seem to mind me sharing it, so here goes. Spoilered ahead is the forbidden knowledge on how to make your chat messages (and more) colorful (again, and more). It seems largely unknown as of now. Read at your own peril.
Typing § followed by a single character can change the properties of your messages in chat as well as the names of your Minecraft worlds.
Typing numbers 0-9 generally changes the colour. Same for letters a-z. With one exception. §k allows you to type characters that change unreadably fast, much like the ones in the end poem, but faster. Only works with the default Minecraft font, it seems. So you will see normal letters if you use, say, the pirate speak localization, which alters the font the game uses.
I doubt this will ever be fixed as this does not seem to me to be a bug or anything of the like in the first place. Unless of course it becomes a problem to the community, then I'm sure Mojang will change it somehow. It's pretty neat.