Keith is a doodler/amateur cartoonist, and this periodic take is in that style, so the font is deliberate. He was happy to see Fabiola Gianotti’s announcement of the discovery of the Higgs boson in Comic Sans.

Also, it’s really Comic Relief, as he wanted it to be OFL.

https://elements.wlonk.com/Dev/MakingDerivativeWorks.htm