Who started “Leave Britney Alone!”?

Chris Crocker (now Cara Cunningham), on YouTube, Sep 10, 2007. It reached 6 platforms in 13.6 years.

LineageContestedKey steps, 11 of 15. Lines follow time and platform
Chris Crocker (now Cara Cunningham)First postLeave Britney Alone | Know Your MemeYTMND and celebrity blogsOpen webCNN / Jeanne MoosTVBacklashOwner responsePressCommercialMilestonePlatform jumpOwner responseAfterlifePatient zero