It's not innocuous when it's right outside my bedroom, focused by the alley. Cities can be quiet, too. People should not have to put up with abuse because they live in a city. Let's say that your neighbor comes home at 3:00 AM when you're sleeping and lets out a war-whoop locking the car door. People do that. Or, since you posted about motorcycles, how about the guy who blasts past your house at 3:00 AM with their Harley. It's all unwanted noise. In that case, since you are bothered by loud bikes, that one's your problem, too.
Richard