Finally saw it firsthand yesterday. Northern team visiting against a home Southern team. 1st game of the DH was uneventful as mainly parents and the usual fans and the small gathering of visitors who made the long trip were in attendance. Nothing got out of hand.
But as game number 2 went into the later hours, a greater number of home students showed up to watch and hang out. A group of guys showed up with a cooler and "secretly" hid their beers in coozies. Then the Lacrosse team showed up to hang out with the guys and several brought their own beverages. A few large football players showed up and sat amongst the Northern visitors.
Soon thereafter, their phones delivered the twitter handle of the opposing catcher and they started yelling it at him. Catcher did look up and smile. Then the phones started providing the names of the opposing player's girlfriends. And it got worse from there. One of the vistiting Mom's started yelling at the kids, and then one of the Dad's started yelling, "you don't want none of this". Which only made it worse.
As the home team came back to tie, the opposing pitcher was told, "it's all your fault". Opposing fans were disgusted. To be honest, some of the home team's fans were shocked as well. Then the chant went up, "Andy Andy Andy" and some kid walks over with a book bag and pulls out a fifth of Vodka and starts to pass it around. Uh Oh. This is about to get crazy.
Finally, an associate AD walks over and decides to sit amidst the guys. And things settled down. Shortly thereafter, the big party must have started somewhere else on campus, and the group of guys left.
Game 3 on Sunday was a 1 pm start and way too early for the drunk students to show up. So, it was as uneventful as game 1.
But yes, if there is something on a player's facebook, twitter, instagram, etc.. that can be yelled at him, it can and will happen.
The main lesson that I gathered from this is that parents in the stands should have very low expectations for opposing students in the stands. And, expect much worse if those students are drinking. And that the players on the field really don't care and find it funny. So, don't get bent out of shape.