Yes, because God forbid the people at the games actually, you know, watch the games instead of surfing the web, tweeting inane opinions or Facebooking their opinions of the refs. And "tragedy"? Really? If the officials at these stadia have emergency plans for disasters that depend on all the fans having cell phone access, they ought to be flogged. We've had major sporting events for a *whole* lot longer than we've had cell phones.
Disclaimer: I've worked in wireless since the early days of cellular, and I was a field tech at Cellular One in Seattle back when turning up the 20th tower in the Seattle MSA was a big deal for us. So I understand that what you are saying is correct technically, but I'm far from convinced that this is a burning issue that the FCC needs to address. I'm still further from convinced that this isn't simply more kowtowing to the wireless carriers to allow them Yet Another Revenue Stream for which they do nothing.
And I have a repeater at my house. I'm in a semi-rural area, and the signal strength at my house flat-out sucks. My little signal repeater puts out at most 1W, and my nearest neighbor is about 200 yards away. I don't think I'm likely to cause significant interference to anyone, but it improves the usability of my cell phone dramatically.