I love that she's enthusiastic about it but damn, if I get someone like this behind me at a competition, I'm seriously gonna tell them to shut the hell up. You can contain yourself at least somewhat. Have some consideration for those around you. This is also why you never get the cheap seats.
Sure you would dude. Everyone always talks tough about what they would do on internet. And even if you did say something, I am sure you would be polite and respectful about it.