While I have no problems with the site changing everyone's avatar with Unicorns, doing the same with the Flair API's has consequences extending outside Stack Overflow which has hit me hard today.
Is is possible next year to exclude the Flair API from any and all April Fools' jokes? I think that a small and modest feature request that won't cause any lost of functionality.
EDIT: Actually, only the JSON feed seem affected by this problem. https://meta.stackoverflow.com/users/flair/131377.json
EDIT 2: I would really appreciate to have an official response as to if this will reoccur next year.