There goes the neighborhood

a neighborhood usually goes bad when some people move in that may diturb the peace. kind of like how christopher columbus did when he kind of tried to take ove land that the native americans previously owned. like when people that are loud come into a neighborhood, they are more likely yo cause a disturbance than people who tend to keep to themselves in a loud neighborhood.
so people that tend to throw parties can really just change the neighborhood entirely in good ways and in bad ways. for example, if the area is quiet, loud parties would be more rare so if a new neighbor were to throw a loud party it would be a pretty big disturbance.
but on the other hand, people can sometimes use more parties. we all know these boring people that never want to have fun. so picture if a loud person comes into a neighborhood with all people that are workaholics and that never have fun. that one person could be a huge part of those people lives. hopefully a positive influence.
also, the way the neighborhood is presented could be changed. most of the time, there is that one house in the neighborhood that has residents that never take care of their house. so there would be a far less chance of that particular neighborhood to have a movie star, or an actual movie to be shot on that block. so yeah that person could possibly ruin it for everyone.
that particular family could also be very different than everyone else. so it would be nice to have a little cultural change every now and then. if theyre actually that loud, then you will actually be affected a little by them and you may learn a little by their habits.
so there really isnt a such thing as there goes the neighborhood because people can be positively and negatively affected by how a diffent resident comes into a neighborhood. just like how america was affected by the europeans coming and taking over. so you should just try to make the best of every new commer in your particular neighborhood.