People completely oblivious to their actions and having no, none, zero, zilch respect for their neighbors.
So here I am, tenting it amongst another large group of tents. I come back to the site after noon to get out of the sun and find this thing parked right next to us. No problem. Bring what you got. About 20 minutes later I'm dozing off and they fire up an industrial strength (loud) generator. I'm in my tent getting gassed and deafened from them being parked upwind. I get out just in time to see them closing all their windows and getting ready to spend the afternoon in the comfort of their A/C. A little common courtesy would suggest not parking next to a bunch of tents if you are planning to use a generator all day. At the very least, get a Honda, not the cheapest surplus made in china refurb for sale at oil-rigs-r-us.
How about the EAA set aside a non-generator area if members are going to be so ignorant?
Then there's the "Hey look at me I'm on a Hardly Davidson and I don't like mufflers" idiots. They're the ones riding though the campground blipping the throttle all day and night. A guy the next row over even has a scooter with the muffler removed to match his rattle-trap POS Harley. Great when the Fly-in theater runs late and these dolts ride back. We know you are probably trailering it to Sturgis after AirVenture. We don't care. This is Oshkosh, not Sturgis. Want to impress us? Show up in a shiny new fire truck. And to the guy with the golf cart with worn out engine - the mosquitoes aren't that bad, you don't need to drive around fogging the campground while people are outside eating dinner.
Maybe quiet time should mean quiet time. No vehicles after 11pm unless you are handicapped or just arriving. If you can walk around the displays all day, you can make it to showers or porta-johns at night without driving.