I have started to notice this at literally every single sporting event that I've been to over the past several years. I think that for some reason, the "golf attitude" of no sound allowed until action is over is taking over fans. Also, I've noticed that, increasingly, going to sports is purely a social opportunity. I mean, there might as well not be a game going on, people are just going for a different place to sit and talk. I can't count how many minor league games I went to this summer where there was at least one group in my immediate vicinity that paid absolutely zero attention to anything other than their personal conversations besides the National Anthem and the 7th inning stretch. Sports seem to be increasingly just passive entertainment, and it really is a shame.
I'd love to go to a game where the crowd was like the ones that constantly got us penalties when that bullshit rule about crowd noise levels was in place. Only game I've been to was the New Mexico St. game, and while it was really neat, I really want to experience the true electricity that nowadays only comes with a scUM game or a major OOC matchup.