ELO in most contexts is a sort of "strength" rating so I decided when doing a few dozen that I would choose whichever had more impact on history. Or to put it another way, I was choosing the thing that would cause the most differences if it didn't exist. In my case I got Hitler vs Electricity so the latter is the obvious choice but anyone else using the same criteria as me has perfectly good reason to choose Hitler over some random sport team or most other individuals.

Though yes it's the internet, so it's probably mostly people doing it for the funny.