Not saying its right, but the easier an engine can breath the more power you can get from it. Some of these load exhaust systems are people trying to "improve" the performance of their cars. Normally they are just annoying. The thumping bass in in some of these cars, I wish their car would just vibrate apart like in a cartoon
. When you're sitting there listing to your own radio with the windows shut and all of a sudden you can't hear your own radio its just ridiculous.
Many RV's come with outdoor entertainment systems these days. Never understood sitting in the "great outdoors" watching tv. As for stereos many are just too loud. If I can listen too your radio several sites away, it's too loud. Also, turn it off when you leave. I think I've used my outdoor speakers twice. The most recent is we were in the "resort" on a week day and we were pretty much alone. I did a walk around to see how far my sound traveled to insure I did not disturb anyone.
Also put your campfire out before you leave. Don't leave it smoldering and smoking up the place.
Common courtesy, well it's just not that common anymore.