I honestly haven't seen it much at travel baseball events, showcase ball is pretty much two teams, umps, coaches, field guys, and some scouts. Not much organization into concessions or otherwise. Not sure about travel basketball, etc.
High school is another matter. We've got walkup songs and the kids push the envelope and usually get warned a few times a year about songs until they are off the playlist. There is a difference between clean lyrics and appropriate content at a school game, so its usually the clean versions of songs making it through a portion of the season as filler songs before the AD actually listens to the words and sends word that she's pulling the music.
A good example is "Pour it Up" by Rihanna. Clean version seems harmless, pretty much everyone is into the beat until the AD hears, "strippers going up and down that pole..." or "bands makes your girl go down..." then she threatens to cut all walkup songs and between inning music.
First rule is kids can't be in charge. I heard about 30 seconds of uncut Lil Wayne's Gonorrhea at a school field a while back. Still remember the look on this old guys face when he told me it didn't sound like "baseball music".