I'm sure there is a term for this, which I don't know yet, but I clicked a link that was shared on social media, and then 2 or 3 clicks later I found myself on probably the ridiculous website I've ever landed on (I'm 35; I don't visit sites about frat moves...), but I got a good laugh out of a page or two of their "most delusional fan base" series.
Relevant example: http://totalfratmove.com/michigan-has-the-most-delusional-fan-base-in-the-big-ten-east/
An avalanche of evidence I can't argue with.