Yep. I see that at Herd sports, and on the general campus. Why? I can understand, not agree with, but understand somebody thin enveloped by state U in a bigger state rooting for state U over the directional he gets into, but WV just does not run like that. Anybody who can get into WVU can get into MU and v-v. There are very few programs where somebody has to go to MU because WVU does not offer that (the reverse is more true). So if you like USPAM, go to USPAM.
The weirdest thing I see is people with 3rd team gear on. Like some idiot wears a Steelers jersey to a Saints-Rams game or a Cubs hat to Royals-Blue Jays. See that a lot on TV. Why? In addition to WVU gear, I often see Outlaw State, Ohio, and UK gear at our games. Hey, if you cannot wear MU stuff, at least just wear a plain shirt.
I remember, years ago, the state's prosecutors were having a meeting in the Big City. Back during the I-AA era. I suppose out of the 55 maybe 45 or so went to USPAM, probably 30 or more twice. They brought them to the game. Pretty drunk crowd. Makes you have a lot of faith in politicians. Started singing WVU fight song and that idiotic cheer.