For what it's worth, my trip to Huntington in 2010 wasn't terrible. A few of my 110 buddies and I got there early to tailgate with other Ohio fans, but ended up tossing a football with some Marshall fans who warned us to "Wait it out" if we beat them later, since our tickets were over by their student section. They were some of the nicer fans I've encountered.
We did have OHIO painted across our chests, so it's not like we were innocent fans going into the stadium, so the general ribbing and expletives we received weren't surprising. But it wasn't terrible, and it was nothing I would cry home about. I'd say it was a rather PG-13 kind of day. I was a bit taken aback when we moved over to the Ohio fan section, and we were harassed non-stop by a group of six-year-old kids as their parents just watched. Some of the things that came out of their mouth I would've been slapped for saying, but you can just attribute that to awful parenting, since there was no effort by their parents to stop them.
And not surprisingly, it got worse when we leaved the stadium. Most of it was students, including the empty beer can thrown at our car. We just laughed and said, "Wait until next year, friends" (not in those exact words...

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Overall, I was impressed by the passion and the atmosphere, and I wasn't surprised by anything that happened. I didn't have a family there with me and I was a student at the time, so obviously my expectations were a bit different than those with family or loved ones there.