I had the exact same experience at the last game I attended, the 2016 Wild Card against the Giants. It wasn't me, but a group of age 21ish guys standing up and going nuts when the Packers were on defense. A group of old farts behind us kept screaming at them to sit down, and I stayed out of it but they were driving me insane. They kept saying it like they owned the damn place, even dropping a "We've been coming here since before you were born!" line. OK? Great, it's not yours, and you guys suck as fans. Eventually, I swear I'm not making this up, one old guy GRABS the kid by the hoodie and yanks him backwards, could have seriously hurt him, then THE OLD GUY has the nerve to summon security and complain about the kid standing up. At this point people all start vouching for the kids and security just says he's allowed to stand up. Another guy probably about 40, who was probably 6'7, turns to the old guy and says if he touches the kids again he'll knock him out right there no matter how old he is. That was pretty much the last straw for me - but I actually agree with your point, that the geezer football purists are really damaging to the atmosphere at Lambeau.