I still live with my family in a decent sized trailer park, and luckily we don't have that many problems relating to noise around here. When we do, it usually lasts a few days/nights, then goes away. The noise can range from the neighbors blasting their bass across the street between 11 P.M and 1:30 A.M, the guy down the hill revving his motorcycle late at night, and even the neighbors across the street revving their loud, old truck. Not for the sake of going anywhere, mind you, just revving it for the sake of revving it.
Lately it's the people that live right behind my house that's caused the most grief. The kids don't seem to understand the concept of their yard and our yard, so they end up in our yard quite a bit. Now, we understand that the yards are rather small here so we don't mind as long as they don't break anything that belongs to us. It's when they start throwing/kicking a ball around and it keeps hitting the house that we start to have a problem with it. They've gotten close to hitting windows before, and the skirting around the house is already weak from wind damage. As for going and asking them to be more careful, the population of my neighborhood is mainly Hispanic and most of the parents barely speak English, if any at all. Trying to tell the kids to quit just ends with them smarting off or acting like they'll stop, then going right back to whatever they are doing as soon as you go back inside.
Common courtesy; we don't haz it. ~_~